<p>Composer symlinked the plugin from its physical directory into craft's vendor directory. The plugin directory as a result of this was not mounted into the docker container. Thus, craft was not able to locate the plugin as it wasn't mounted into my docker container. All I did to fix this was move the project(plugin) into craft's vendor director.</p>

CC BY-SA 4.0
2020-02-25T09:16:13.347Z
2020-02-25T09:16:13.347Z
Segun Ogundipe
<p>I am working on a plugin in Craft:3.4. I get this error while trying to install the plugin in the CP.</p>
<pre class="lang-php prettyprint-override"><code>yii\base\ErrorException: include(/app/vendor/composer/../wittsstratts/craft-company/src/Company.php): failed to open stream: No such file or directory in /app/vendor/composer/ClassLoader.php:444
Stack trace:
#0 /app/vendor/craftcms/cms/src/web/ErrorHandler.php(74): yii\base\ErrorHandler-&gt;handleError(2, 'include(/app/ve...', '/app/vendor/com...', 444)
#1 /app/vendor/composer/ClassLoader.php(444): craft\web\ErrorHandler-&gt;handleError(2, 'include(/app/ve...', '/app/vendor/com...', 444, Array)
#2 /app/vendor/composer/ClassLoader.php(444): include()
#3 /app/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/app/vendor/com...')
#4 [internal function]: Composer\Autoload\ClassLoader-&gt;loadClass('wittsstratts\\co...')
#5 [internal function]: spl_autoload_call('wittsstratts\\co...')
#6 /app/vendor/craftcms/cms/src/services/Plugins.php(873): is_subclass_of('wittsstratts\\co...', 'craft\\base\\Plug...')
#7 /app/vendor/craftcms/cms/src/services/Plugins.php(478): craft\services\Plugins-&gt;createPlugin('company')
#8 /app/vendor/craftcms/cms/src/controllers/PluginsController.php(50): craft\services\Plugins-&gt;installPlugin('company', NULL)
#9 [internal function]: craft\controllers\PluginsController-&gt;actionInstallPlugin()
#10 /app/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#11 /app/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction-&gt;runWithParams(Array)
#12 /app/vendor/craftcms/cms/src/web/Controller.php(178): yii\base\Controller-&gt;runAction('install-plugin', Array)
#13 /app/vendor/yiisoft/yii2/base/Module.php(528): craft\web\Controller-&gt;runAction('install-plugin', Array)
#14 /app/vendor/craftcms/cms/src/web/Application.php(290): yii\base\Module-&gt;runAction('plugins/install...', Array)
#15 /app/vendor/craftcms/cms/src/web/Application.php(558): craft\web\Application-&gt;runAction('plugins/install...', Array)
#16 /app/vendor/craftcms/cms/src/web/Application.php(269): craft\web\Application-&gt;_processActionRequest(Object(craft\web\Request))
#17 /app/vendor/yiisoft/yii2/base/Application.php(386): craft\web\Application-&gt;handleRequest(Object(craft\web\Request))
#18 /app/web/index.php(21): yii\base\Application-&gt;run()
#19 {main}

</code></pre>
<p>This question is related to <a href="https://craftcms.stackexchange.com/questions/23466/php-warning-with-composer-on-macos-high-sierra-failed-to-open-stream">this</a> but with a different setup.</p>
<p>Tools:</p>
<blockquote>
<p>Docker:19.03.5</p>
<p>Composer:1.10-dev</p>
</blockquote>
<p>This might help anyone facing this same issue.</p>
<p>I found the reason for the error was because I was using docker. Composer symlinks the plugin from its physical directory into craft's vendor directory. The plugin directory as a result of this was not mounted into docker container. Thus, craft was not able to locate the plugin directory. All I did to fix this was move the project(plugin) into craft's vendor director.</p>

CC BY-SA 4.0
2020-02-24T15:26:55.787Z
Please can you share the content of your composer.json file? It looks like one of your dependencies (perhaps a custom plugin or module) is not found.
Romain P.
CC BY-SA 4.0
2020-02-24T17:22:24.423Z
@RomainPoirier, I was able to fix it. I've updated my question. Kindly check. Thank you
Segun Ogundipe
CC BY-SA 4.0
2020-02-24T22:26:22.920Z
Could you share your update as an official answer, @SegunOgundipe?
Brad Bell
CC BY-SA 4.0
2020-02-25T09:16:42.417Z
Done. @BradBell
Segun Ogundipe
CC BY-SA 4.0
2020-02-25T23:10:46.783Z
Thanks!! @SegunOgundipe
Brad Bell
<plugin-development><craft3>
PHP warning with composer on MacOS Mojave: Failed to open stream: No such file or directory
# PHP warning with composer on MacOS Mojave: Failed to open stream: No such file or directory

(Asked by: username_0 on 2020-02-21)

I am working on a plugin in Craft:3.4. I get this error while trying to install the plugin in the CP.
yii\base\ErrorException: include(/app/vendor/composer/../wittsstratts/craft-company/src/Company.php): failed to open stream: No such file or directory in /app/vendor/composer/ClassLoader.php:444
Stack trace:
#0 /app/vendor/craftcms/cms/src/web/ErrorHandler.php(74): yii\base\ErrorHandler->handleError(2, 'include(/app/ve...', '/app/vendor/com...', 444)
#1 /app/vendor/composer/ClassLoader.php(444): craft\web\ErrorHandler->handleError(2, 'include(/app/ve...', '/app/vendor/com...', 444, Array)
#2 /app/vendor/composer/ClassLoader.php(444): include()
#3 /app/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/app/vendor/com...')
#4 [internal function]: Composer\Autoload\ClassLoader->loadClass('wittsstratts\\co...')
#5 [internal function]: spl_autoload_call('wittsstratts\\co...')
#6 /app/vendor/craftcms/cms/src/services/Plugins.php(873): is_subclass_of('wittsstratts\\co...', 'craft\\base\\Plug...')
#7 /app/vendor/craftcms/cms/src/services/Plugins.php(478): craft\services\Plugins->createPlugin('company')
#8 /app/vendor/craftcms/cms/src/controllers/PluginsController.php(50): craft\services\Plugins->installPlugin('company', NULL)
#9 [internal function]: craft\controllers\PluginsController->actionInstallPlugin()
#10 /app/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#11 /app/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#12 /app/vendor/craftcms/cms/src/web/Controller.php(178): yii\base\Controller->runAction('install-plugin', Array)
#13 /app/vendor/yiisoft/yii2/base/Module.php(528): craft\web\Controller->runAction('install-plugin', Array)
#14 /app/vendor/craftcms/cms/src/web/Application.php(290): yii\base\Module->runAction('plugins/install...', Array)
#15 /app/vendor/craftcms/cms/src/web/Application.php(558): craft\web\Application->runAction('plugins/install...', Array)
#16 /app/vendor/craftcms/cms/src/web/Application.php(269): craft\web\Application->_processActionRequest(Object(craft\web\Request))
#17 /app/vendor/yiisoft/yii2/base/Application.php(386): craft\web\Application->handleRequest(Object(craft\web\Request))
#18 /app/web/index.php(21): yii\base\Application->run()
#19 {main}


This question is related to this but with a different setup.
Tools:

Docker:19.03.5
Composer:1.10-dev

This might help anyone facing this same issue.
I found the reason for the error was because I was using docker. Composer symlinks the plugin from its physical directory into craft's vendor directory. The plugin directory as a result of this was not mounted into docker container. Thus, craft was not able to locate the plugin directory. All I did to fix this was move the project(plugin) into craft's vendor director.

**Tags:** plugin-development, craft3

> **Comments:**
> **username_1**: Please can you share the content of your composer.json file? It looks like one of your dependencies (perhaps a custom plugin or module) is not found.  
> **username_0**: @RomainPoirier, I was able to fix it. I've updated my question. Kindly check. Thank you  
> **username_2**: Could you share your update as an official answer, @SegunOgundipe?  
> **username_0**: Done. @BradBell  
> **username_2**: Thanks!! @SegunOgundipe  

---

## 1 answers

### Answer by username_0 on 2020-02-25. Score: 1 | Accepted answer

Composer symlinked the plugin from its physical directory into craft's vendor directory. The plugin directory as a result of this was not mounted into the docker container. Thus, craft was not able to locate the plugin as it wasn't mounted into my docker container. All I did to fix this was move the project(plugin) into craft's vendor director.


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