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Pourquoi ne puis-je pas ajouter ou installer des extensions dans WordPress ? (5 Corrigés faciles)

Note éditoriale : Nous percevons une commission sur les liens des partenaires sur WPBeginner. Les commissions n'affectent pas les opinions ou les évaluations de nos rédacteurs. En savoir plus sur Processus éditorial.

L’une des questions les plus fréquentes que nous posent nos lecteurs est la suivante :  » Pourquoi ne puis-je pas ajouter des extensions dans WordPress ? « .

Cette situation se produit généralement lorsque l’utilisateur/utilisatrice voit un message de mise à niveau ou que sa zone d’administration ne dispose pas du menu « Plugins ». Si vous êtes confronté à ce problème, vous êtes au bon endroit.

Dans cet article, nous allons expliquer pourquoi il n’est pas possible d’ajouter ou d’installer des extensions dans WordPress.

Why Can't I Add or Install Plugins in WordPress

Ce guide a listé 5 des principales raisons pour lesquelles vous ne pouvez pas ajouter ou installer des extensions dans WordPress. N’hésitez pas à utiliser les liens rapides ci-dessous pour aller à/au Sujet spécifique qui s’applique à votre situation :

1. Vous êtes sur WordPress.com

WordPress.com est un service d’hébergeur de blogs qui propose une version limitée du célèbre logiciel auto-hébergé WordPress. Consultez notre guide sur la différence entre WordPress.com et WordPress.org pour plus de détails.

Les utilisateurs de WordPress.com ne peuvent pas installer d’extensions à moins de passer à l’offre Business ou à une offre supérieure, à partir d’environ 300 $ par an. Si vous bénéficiez d’une offre gratuite, personnelle ou premium, vous ne pouvez pas installer d’extensions tierces.

WordPress.com plugins

Si vous ne souhaitez pas payer ce montant, vous pouvez déplacer votre blog de WordPress.com à WordPress.org.

Si vous avez besoin d’aide, vous pouvez utiliser notre service gratuit de configuration de blog WordPress. Indiquez simplement que vous souhaitez que nous transférions votre site, et nous le ferons gratuitement.

2. Il existe des restrictions concernant le rôle des utilisateurs/utilisatrices.

WordPress est doté d’un système de gestion des rôles des utilisateurs/utilisatrices intégré. Parfois, les développeurs/développeuses ne donnent pas l’accès Administrateur/administratrice à leurs clients. Au lieu de cela, ils leur créent un compte d’éditeurs/éditrices.

Administrator vs Editor dashboard in WordPress

Seuls les administrateurs/administratrices peuvent installer et activer des extensions sur un site WordPress. Si vous êtes le propriétaire du site, vous devez demander à votre développeur/développeuse de s’assurer que vous disposez des droits d’administrateur/administratrice.

3. Vous êtes confronté à un problème de limite de mémoire

Le deuxième scénario le plus courant est que vous pouvez voir et accéder à la page des extensions, mais que vous ne pouvez pas installer d’extensions. Lorsque vous essayez d’installer des extensions, un message d’erreur s’affiche.

Cette erreur est généralement causée par la limite de mémoire de PHP. WordPress utilise le langage de script PHP et chaque script PHP utilise une certaine quantité de mémoire.

Il existe des réglages dans votre hébergeur WordPress et dans le cœur de WordPress qui définissent la quantité de mémoire qu’un script PHP peut utiliser.

Lorsqu’un processus atteint cette limite, il se termine ou affiche une erreur comme celle-ci sur votre site WordPress:

Erreur fatale : La taille de mémoire autorisée de 67108864 octets est épuisée.

La solution rapide à ce problème est d’augmenter la limite de mémoire de PHP. Vous pouvez le faire en ajoutant cette ligne à votre fichier wp-config.php:

define('WP_MEMORY_LIMIT', '256M');

Pour des instructions plus détaillées, consultez notre guide sur la façon de corriger l’erreur WordPress memory exhausted.

4. Vous êtes sur un réseau multisite

Une autre raison possible pour laquelle vous ne pouvez pas voir le menu Plugins dans WordPress est que votre site fait partie d’un réseau multisite WordPress et que l’admin du réseau a désactivé l’élément de menu Plugins sur les sites du réseau.

Installing plugins on multisite network

C’est à peu près le même scénario que pour WordPress.com. Les admin du réseau doivent tenir compte de la stabilité du serveur, de la sécurité de WordPress et des problèmes d’équilibrage de la charge. Pour résoudre ce problème, vous pouvez demander à votre administrateur/administratrice réseau d’installer des extensions pour vous.

Pour en savoir plus sur ce Sujet, consultez notre guide sur les raisons pour lesquelles vous ne voyez pas toutes les extensions sur les installations multisites de WordPress.

5. Vous avez téléversé le mauvais fichier d’extension.

Imaginons que vous souhaitiez téléverser le fichier d’une extension tierce, mais que WordPress affiche un message d’erreur comme ci-dessous :

Example of plugin upload error

Dans ce cas, vous pouvez vérifier si vous téléversez le bon fichier. Les fichiers d’extension sont généralement livrés dans un paquet .zip, ce qui signifie qu’ils utilisent le format .zip.

Vous pouvez également vérifier si les fichiers de contenu zip que vous avez téléchargés sont compatibles. Toutes les extensions tierces ne proviennent pas de sources fiables, et c’est peut-être la raison pour laquelle elles ne téléversent pas correctement.

En savoir plus sur l’installation des extensions, consultez nos guides ci-dessous :

Nous espérons que cet article vous a aidé à comprendre pourquoi vous ne pouvez pas ajouter ou installer des extensions sur WordPress. Vous pouvez également consulter notre liste des extensions WordPress incontournables et notre guide sur les erreurs WordPress courantes et comment les corriger.

If you liked this article, then please subscribe to our YouTube Channel for WordPress video tutorials. You can also find us on Twitter and Facebook.

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Editorial Staff at WPBeginner is a team of WordPress experts led by Syed Balkhi with over 16 years of experience in WordPress, Web Hosting, eCommerce, SEO, and Marketing. Started in 2009, WPBeginner is now the largest free WordPress resource site in the industry and is often referred to as the Wikipedia for WordPress.

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Reader Interactions

109 commentairesLaisser une réponse

  1. Syed Balkhi says

    Hey WPBeginner readers,
    Did you know you can win exciting prizes by commenting on WPBeginner?
    Every month, our top blog commenters will win HUGE rewards, including premium WordPress plugin licenses and cash prizes.
    You can get more details about the contest from here.
    Start sharing your thoughts below to stand a chance to win!

  2. hossein says

    Hello
    I can see the plugin menu and the plugin I have installed
    But the add new plugin button is disabled
    can you help me?

    • WPBeginner Support says

      There is a good chance your site is a part of a multisite network. If it is not then we would recommend checking that you do not have any plugins that would prevent adding new plugins.

      Administrateur

  3. samaneh says

    I can see plugin widget in my dashboard but when I clink on add plugin, there are no plugins. I just see an error:
    « An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums. »
    If I search a plugin name in search bar, the page refreshes but finally this massage appears again.
    what did happened?

    • WPBeginner Support says

      For that error, we would recommend checking with your hosting provider to see if they have the specific error logged or if they may have a setting in their system that may have blocked the connection to WordPress.org.

      Administrateur

  4. DaninMCI says

    How ridiculous. I have several websites and I was going to create a new WordPress-based site that needed to use a comparison chart but I’m not willing to pay $300 a year for plugins. I’ll go elsewhere I guess.

    • WPBeginner Support says

      As we say in that section, if you do not want to pay $300 per year, we would recommend using WordPress.org which is a WordPress site on another hosting provider :)

      Administrateur

  5. Richard Ross says

    I have inserted the plugin name but it still prompts me the same error.

    Error: The plugin has no name. Add a Plugin Name: line to your main plugin file and upload the plugin again. For more information, please review our documentation on Plugin Headers.

    • WPBeginner Support says

      If the plugin is one you’re downloading from an external site you would want to reach out to the plugin’s support with that error message. If it is a custom plugin then you would want to ensure your plugin name is set as a comment in the header.

      Administrateur

  6. Pascal Idhiarhi says

    Hi, I tried to add new plugin, and theme. But I am currently getting 403 Forbidden error. What can I do?

  7. Deborah says

    I have a multisite and I installed several plugins but one isn’t showing. I can see it when I go to plugins and I have activated it but it is not showing up in my dashboard so I cant use it. Help. Why isn’t a particular installed and activated plugin showing up in m dashboard but other plugins are?

    • WPBeginner Support says

      Not all plugins work with multisite installations, we would recommend checking with the support for that plugin and they would be able to help with any issues like this.

      Administrateur

  8. Akshay says

    Hi,
    Thank you for sharing knowledge. We have a wordpress website hosted on our company internal server. Now we would like to migrate it to our cloud platform.
    I tried to click Add new plugin to install « All-in-One WP Migration ». However whenever I click on ‘Add new’ link server is returning 503 error. Rest all links on admin page works fine.
    Any suggestions?

  9. Evan Cleary says

    I set up a WordPress site in 2014 and was able to get plugins without going into a business plan. And I sent up another site a few years ago and it was also not any problem to add plugins. As far as I know, it was via WordPress.com and not WordPress.org – I downloaded a theme and editors that and used my own URL hosted by a hosting company. I’m quite confused now as no one seems to be saying that this policy of having to pay for a business plan is a new thing. Is it a new thing?

    • WPBeginner Support says

      If your site is on a hosting provider and not the WordPress.com website then it is a WordPress.org site. Having to purchase the business plan on WordPress.com for access to plugins is not something new.

      Administrateur

  10. karan says

    I had one site of mine that had the issue of no option for adding or updating plugins. For some reason define(‘DISALLOW_FILE_MODS’,true); was in my wp-config file.

    Once I deleted that line, my plugin options were restored. It took me a while to find this solution. I hope this helps people find this solution.

  11. Heide says

    Thanks for the good article! I am bit confused, because I am super administrator and can’t install any new plugins. I can activate and deactivate plugins for sites or the whole network. But I don’t have the page for plugin installtion. Do you have any suggestions in this case? Thanks!

    • WPBeginner Support says

      If you’re using a multisite like it sounds like you are, you would need to install the plugin in the network admin area rather than on the individual sites.

      Administrateur

  12. anis says

    when i try to install a pluging it shows the following:
    Installation failed: Abort class-pclzip.php : Missing zlib extensions
    what should i do

    • WPBeginner Support says

      For that error, you would want to first reach out to your hosting provider and they should be able to assist.

      Administrateur

  13. Amy Skea says

    I can’t download I get this message. I have tried various plugins and get the same.
    Thank you

    Installation failed: Could not copy file. wp-fastest-cache/wpFastestCache.php

  14. Amarnath says

    Hey, I am troubling to install wordpress.
    « The MySQL Connection could not be established. »
    It is written like this what should I do?

    • WPBeginner Support says

      You would want to ensure your username and password in your wp-config file are the correct ones, you may also want to check with your hosting provider’s support if this is a new error and they should be able to assist.

      Administrateur

  15. Zeeshan says

    hi!
    i am install pulgin but faild.
    and ERROR IS

    Fatal error: Maximum execution time of 30 seconds exceeded in G:\xampp\htdocs\Ecommrace\wp-includes\Requests\Transport\cURL.php on line 462

  16. Ale Sants says

    Hello! Same problem here. Cannot ADD plugins.

    More details of my site:

    WordPress 5.2.2 running Bridge theme, so WordPress.org. no .com

    Hostgator for hosting

    I am an admin and no one else has ever done any work on the site, so I am the only admin for sure.

    Please help and thanks in advance!

  17. Rishabh Jain says

    Hey!
    I want to install WP super cache plugin but when I search it in plugin dialog box, on right top corner it shows ‘Not Available’ Why is it so? Is there any problem with my blog. Please help me out…

  18. Mazie says

    Don’t know what I’m doing wrong with new wordpress.com blog (true newbie). My menu doesn’t look like those above. All I see are the following 7 options, all are listed on the left: Site Identity, Colors & Backgrounds, Fonts, Header Image, Menus, CSS and Widgets. I guess my question is, is this as it should be for the free (.com) site? Is it from this menu that I will create and complete my free blog?

    Sorry to be so ignorant about this. I think I’m missing something as I don’t imagine it’s supposed to seem so confusing.

    Thank you!

    Mazie

    • WPBeginner Support says

      Sadly, our tutorials are for WordPress.org rather than WordPress.com which is what you’re using would be part of the confusion. If you go to the wp-admin area of your WordPress.com site the admin area will look similar but you will still have the WordPress.com limitations.

      Administrateur

  19. Sasha says

    Deactivate WordPress Plugin: WP Editor and you will be able to see list of your hidden plugin. WP Editor not tested/comparable with new WP version and php 7.

  20. chris says

    I am trying to install a plug-in on a website that a company designed for me but I don’t have the plugin option in my administrator menu (made sure I was an admin not just a editor). My admin bar is also Red with « PRODUCTION SERVER » next to my name. Are these too related? How to I add plug-ins if I don’t have the the plug-in tab?

  21. Nalin Puri says

    I am using InstantWP Named automated wordpress local server.If i buy my hosting service can i shift my blog from instant vp to that hosting server of GoDaddy

  22. sajilesh kurup says

    Hi,

    on wordpress website i am able to see pulgin menu, however as i hover mouse pointer over it not displaying option menu of add new

  23. anh tuan says

    please help me! i’m a admin on my website but i can’t see any plugins on plugin dashboard, in my hostin, it still no problem??

    • WPBeginner Support says

      Hello,

      You may not have an admin account or someone you hired to work on your website has disabled your access to plugins area. Sometimes developers do this to make sure that their customers don’t accidentally break their websites.

      Administrateur

  24. Judy Adams says

    I tried adding the plug in contact form 7 add-on now I get a white a screen after activating or trying to activate. I cannot go to my dashboard or anything in word press now. When trying to FTP in to deactivate plugin I am not sure what login and password to use. Can you please help me? I don’t want to lose my whole website I created because I cant get in now.

  25. Riazvic says

    Hi,
    I am having an e-commerce website, unfortunately, I am having a theme which came with a premium plugin which I have purchased. their plugin section is available but widget section is not available how can I put google translate code into that theme where should use that code in the theme files?
    I hope to get an answer here.
    thanks in advance for your support.
    Kamal

  26. David says

    Hello.I have the same issue of can not add new plugin in wordpress plugin panel.

    1. No « add new » plugin options
    2.No « trash » plugin options
    3.Other issue is I can not find the « editor » in appearance panel

    Would you like to let me know how can i fix this?

  27. Jacqueline says

    Hi. I purchased the Divi theme and plug in file. The theme uploaded fine but when I go to upload the plug in file it fails. Anything I can do? Thank you for your support on this matter.

  28. Aziz Nazarov says

    Hello,

    Thank you for sharing such a valuable info.
    Maybe this’s a bit off topic question.
    I’m having a small issue at the moment with adding a new submenu page.
    So basically I got an Astra Theme (not a pro version) with Beaver Builder.
    I add the page as usual then add to the menu under sub-item, all looks good.
    But when I click on the sub menu page it doesn’t take me there. It basically takes me to a home page.
    What could be an issue? Could you help me please?
    Thank you

  29. candy says

    I cannot activated and install my plugin.

    Parse error: syntax error, unexpected T_FUNCTION, expecting ‘)’ in E:\AppServ\www\shopify\wp-content\plugins\ninja-fb-private-reply\src\Facebook\autoload.php on line 45

    please help me fix this .

  30. Mark says

    Hi, I cant log on to my wordpress account. It says « ERROR: There is no user registered with that email address. » I know for a fact that that is the correct email address associated with the account.. Please help!!! I dont have any of the other information required to reset the account (such as transaction ID) HELP!!!!

  31. mark says

    should I switch to wix or weebly? this is stupid. I have to sit here for hours googling to not be able to do the stupidest simplest things. I don’t want to learn wordpress I just want a simple ecommerce site that wont be like a college course to get set up.

    M

  32. lokesh says

    I’m getting this message while installing the plugins.

    An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums.

    How to solve please help

  33. Yeboah Martin says

    I had this message when trying to upload a plugin:

    POST Content-Length of 11688443 bytes exceeds the limit of 8388608 bytes in Unknown on line 0

  34. Jitendra Mahato says

    Hi,
    I have migrated my blog yesterday. All the things are good but the error in the plugin. I have deleted all the plugins. After then, while i am starting to install the plugin, then No, any plugin is adding..
    While adding….
    Messages lke this…
    Could not create directory. /home/danfeh5/public_html/example.com/wp-content/plugins/boombox-theme-extensions

    • WPBeginner Support says

      Hi Angelo,

      If comments are closed on all your articles, then go to Settings » Discussion page inside WordPress admin area and check the box next to ‘Allow people to post comments on new articles’ option. Any new article you now add will have comments enabled by default.

      For your older article you will have to edit them and then on the post edit screen click on the Screen Options button at the top right corner of the screen. Check the box next to Discussion option. Now scroll down below the post editing area and you will see a Discussion meta box where you need to check the option ‘Allow Comment’ option.

      Administrateur

  35. Lisa says

    Hi I got this when trying to install jetpack and its not on my list of plugins and I am not sure what to do Installing Plugin from uploaded file: jetpack.4.9.zip
    Unpacking the package…

    Installing the plugin…

    Destination folder already exists. /home/content/p3pnexwpnas02_data01/46/2075146/html/wp-content/plugins/jetpack/

    Plugin install failed.

    Return to Plugin Installer

    • WPBeginner Support says

      Hey Lisa,

      Your website already has a folder called jetpack. You need to connect to your website using an FTP client or File manager in Cpanel and delete that folder to install the plugin from the zip file.

      Administrateur

  36. Omar says

    Hi, I can see and add plugins in « my » installation (its not a multisite) of wordpress but suddenly there’s no option for activate/delete under the plugin name, but I still can do this trough the bulk actions option… did someone know why this happens?

  37. Rafael says

    I was added as ‘admin’ in a multisite WordPress so I couldn’t see the Plugins. Asked for the ‘network admin’ to enable Plugins in ‘Network Configurations’ but looks like that just allows me to see the Plugins, still not able to install new plugins.

  38. zork says

    awesome man: define(‘WP_MEMORY_LIMIT’, ’64M’);

    this solved my problem after a migration from local to production

    thank you so much!

  39. Ankur Sharma says

    i have installed wordpress on pc with xampp. when i install ULTIMATE MEMBER plugin it shows an error and when i upload the plugin it shows the memory limit problem..
    i have already added that line you mentioned i.e.
    define(‘WP_MEMORY_LIMIT’, ’64M’);

    and also i have changed a line in php.ini file in xampp

    ; Maximum allowed size for uploaded files.
    upload_max_filesize=3000M

    nothing is working .. please help me ..
    Thanks!!

  40. Nicole says

    I have wordpress.com/wp-admin.. I have admin rights and i still have no options for adding new plugins. Any suggestions?

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