# Slim Application Error 500 (Internal Server Error)

**URL:** <https://discourse.slimframework.com/t/slim-application-error-500-internal-server-error/1010>\
**Category:** Questions\
**Created:** [December 19, 2016, 3:42am UTC](https://discourse.slimframework.com/t/slim-application-error-500-internal-server-error/1010 "2016-12-19T03:42:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jcespinosa](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.slimframework.com/jcespinosa/32/260_2.png) [@jcespinosa](https://discourse.slimframework.com/u/jcespinosa)\
**Post date:** [December 19, 2016, 3:42am UTC](https://discourse.slimframework.com/t/slim-application-error-500-internal-server-error/1010/1 "2016-12-19T03:42:53Z")

</div>

Hi I’m new to Slim Framework. Everything works fine in Windows, but when I tried to migrate to Ubuntu  
I got this error. I already changed file and folder permission but nothing works.

sudo find /var/www/ -type d -exec chmod 775 {} ;  
sudo find /var/www/ -type f -exec chmod 664 {} ;

Slim Application Error  
The application could not run because of the following error:

Details

Type: Error  
Message: Class ‘App\Controllers\Auth\AuthController’ not found  
File: /var/www/html/slim-project-template/bootstrap/app.php  
Line: 61  
Trace

#0 /var/www/html/slim-project-template/vendor/pimple/pimple/src/Pimple/Container.php(113): {closure}(Object(Slim\Container))  
#1 /var/www/html/slim-project-template/vendor/slim/slim/Slim/Container.php(123): Pimple\Container-\>offsetGet(‘AuthController’)  
#2 /var/www/html/slim-project-template/vendor/slim/slim/Slim/CallableResolver.php(59): Slim\Container-\>get(‘AuthController’)  
#3 /var/www/html/slim-project-template/vendor/slim/slim/Slim/CallableResolverAwareTrait.php(45): Slim\CallableResolver-\>resolve(‘AuthController:…’)  
#4 /var/www/html/slim-project-template/vendor/slim/slim/Slim/Route.php(314): Slim\Routable-\>resolveCallable(‘AuthController:…’)  
#5 /var/www/html/slim-project-template/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(116): Slim\Route-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#6 /var/www/html/slim-project-template/vendor/slim/slim/Slim/Route.php(297): Slim\Route-\>callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#7 /var/www/html/slim-project-template/vendor/slim/slim/Slim/App.php(443): Slim\Route-\>run(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#8 /var/www/html/slim-project-template/app/Middleware/ValidationErrorsMiddleware.php(25): Slim\App-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#9 [internal function]: App\Middleware\ValidationErrorsMiddleware-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))  
#10 /var/www/html/slim-project-template/vendor/slim/slim/Slim/DeferredCallable.php(43): call\_user\_func\_array(Object(App\Middleware\ValidationErrorsMiddleware), Array)  
#11 [internal function]: Slim\DeferredCallable-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))  
#12 /var/www/html/slim-project-template/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(67): call\_user\_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))  
#13 /var/www/html/slim-project-template/app/Middleware/OldInputMiddleware.php(24): Slim\App-\>Slim{closure}(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#14 [internal function]: App\Middleware\OldInputMiddleware-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#15 /var/www/html/slim-project-template/vendor/slim/slim/Slim/DeferredCallable.php(43): call\_user\_func\_array(Object(App\Middleware\OldInputMiddleware), Array)  
#16 [internal function]: Slim\DeferredCallable-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#17 /var/www/html/slim-project-template/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(67): call\_user\_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#18 /var/www/html/slim-project-template/app/Middleware/CsrfViewMiddleware.php(28): Slim\App-\>Slim{closure}(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#19 [internal function]: App\Middleware\CsrfViewMiddleware-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#20 /var/www/html/slim-project-template/vendor/slim/slim/Slim/DeferredCallable.php(43): call\_user\_func\_array(Object(App\Middleware\CsrfViewMiddleware), Array)  
#21 [internal function]: Slim\DeferredCallable-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#22 /var/www/html/slim-project-template/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(67): call\_user\_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#23 /var/www/html/slim-project-template/app/Middleware/AllowAccessControlOrigin.php(29): Slim\App-\>Slim{closure}(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#24 [internal function]: App\Middleware\AllowAccessControlOrigin-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#25 /var/www/html/slim-project-template/vendor/slim/slim/Slim/DeferredCallable.php(43): call\_user\_func\_array(Object(App\Middleware\AllowAccessControlOrigin), Array)  
#26 [internal function]: Slim\DeferredCallable-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#27 /var/www/html/slim-project-template/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(67): call\_user\_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#28 /var/www/html/slim-project-template/vendor/slim/csrf/src/Guard.php(162): Slim\App-\>Slim{closure}(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#29 [internal function]: Slim\Csrf\Guard-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#30 /var/www/html/slim-project-template/vendor/slim/slim/Slim/DeferredCallable.php(43): call\_user\_func\_array(Object(Slim\Csrf\Guard), Array)  
#31 [internal function]: Slim\DeferredCallable-\>\_\_invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#32 /var/www/html/slim-project-template/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(67): call\_user\_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Closure))  
#33 /var/www/html/slim-project-template/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(116): Slim\App-\>Slim{closure}(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#34 /var/www/html/slim-project-template/vendor/slim/slim/Slim/App.php(337): Slim\App-\>callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#35 /var/www/html/slim-project-template/vendor/slim/slim/Slim/App.php(298): Slim\App-\>process(Object(Slim\Http\Request), Object(Slim\Http\Response))  
#36 /var/www/html/slim-project-template/public/index.php(5): Slim\App-\>run()  
#37 {main}

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<div class="post-metadata">

**Author:** ![1f7](https://avatars.discourse-cdn.com/v4/letter/1/91b2a8/32.png) [@1f7](https://discourse.slimframework.com/u/1f7)\
**Post date:** [December 19, 2016, 11:22am UTC](https://discourse.slimframework.com/t/slim-application-error-500-internal-server-error/1010/2 "2016-12-19T11:22:27Z")

</div>

> [@jcespinosa](#):
>
> Everything works fine in Windows

nix file names register sensitive

1. check file/directorys names
2. run `composer dump-autoload`

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<div class="post-metadata">

**Author:** ![jcespinosa](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.slimframework.com/jcespinosa/32/260_2.png) [@jcespinosa](https://discourse.slimframework.com/u/jcespinosa)\
**Post date:** [December 20, 2016, 2:33am UTC](https://discourse.slimframework.com/t/slim-application-error-500-internal-server-error/1010/3 "2016-12-20T02:33:39Z")

</div>

Already solved this issue. Character case.