[yilmaz]

Ok lets do this, disable plugins via the includes/config.php file.

To do that open your includes/config.php file and below <?php add the following.

PHP Code:

define('DISABLE_HOOKS', true); 


So it looks like this:

PHP Code:

<?php
define('DISABLE_HOOKS', true);

If the same problem persists, it may be the php version.
If there is no problem, one of the products is faulty or likewise there is a php version mismatch.