When I go to change permissions, XF tells me I should check the browser console log. This in turn tells me that /admin.php is missing.(See screenshot) It's clearly not as I'm using the admin.php file to even get that far. I'm wondering if it's my .htaccess file. I'm always wary of editing my own htaccess file let alone those provided by others (in this case XF). I should note that this htaccess file predates my 2.0 upgrade and I've edited it to use PHP7 instead of my host's default of 5.6