Cant edit page elements

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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?

 
julehti replied on at Permalink Reply
julehti
I have the very same experience ( 5.7.5.12). For years everything has worked fine but now I can't e.g. upload files.