I am still using verson 5.7.5.13 and I have enabled Advanced permissions in error. This has now stopped any editing of elements on the pages. Even when I am logged in as superuser, and I've checked page and element permissions to be editable by Administrator I cant edit the areas. I get the following error:

Forbidden You don't have permission to access this resource. Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

I can edit the global areas but not the page elements even though the permissions seems to be fine.

Is there something buried somewhere that I've missed?