4
I found out a bit more after I enabled debug mode via phpmyadmin, but still don't know what to do. Here are the errors:
Fatal error: Call to a member function prefix() on a non-object in /[path_to_XOOPS]/htdocs/kernel/module.php on line 355
and 5 errors are reported, which are all the same:
Notice: Use of undefined constant _AUTHOR - assumed '_AUTHOR' in file /modules/system/class/gui/default/default.php line 132
These errors occur when I call up admin.php via the user menu item administration
Before, I found out that a folder which I had created due to recommendations by protector had to be set to writeable, which I then did.