Error 404 on things after "/"

Okay, I'm a little bit further.

My controllers are loading correctly now. I did it with this .htaccess (latest working version, but it works with less code too):

Code:

DirectoryIndex index.php
RewriteEngine on
RewriteCond $1 !^(index\.php|images|css|js|robots\.txt|favicon\.ico)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ ./index.php?/$1 [L,QSA]

But all other stuff, like images or CSS-File are loaded as controller too... Er error message is now "404 - File Not Found - Controller or its method is not found: \App\Controllers\Dashboard::template". "Dashboard" and "Template" are directorys where the CSS-file (in this case) is located.