CI crashes only on home page

On one hosting provider I needed to do it like this.
You can remove the  RewriteCond $1 !^(index\.php|images|resources|vendors|robots\.txt) rule if you want.

Code:

DirectoryIndex index.php
<IfModule mod_rewrite.c>
   RewriteEngine on
   RewriteCond $1 !^(index\.php|images|resources|vendors|robots\.txt)
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

For some reason it didn't like QSA. Like I normally do it. The example above got an extra ? after index.php.

Code:

<IfModule mod_rewrite.c>
   RewriteEngine on
   RewriteCond $1 !^(index\.php|resources|vendor|robots\.txt)
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteRule ^(.*)$ index.php/$1 [L,QSA]
</IfModule>