This is the error I receive:
Request-URI Too Large
The requested URL's length exceeds the capacity limit for this server.
When the error occurs?
Each time I search for an author in the back-end. (wp-admin/users.php)
I have only 60 members and 34 Categories in my website.
Maybe a possible solution would be the possibility to enable/disable the 'Subscription' coloumn in wp-admin/users.php.