Apparently this was the problem: “In the wp-content folder there was a .htaccess that was denying access to all php files.” They renamed it so it won’t be looked at.
Thanks for your help…
Thanks Robert, I will contact my hosting service and find out what is going on, then follow up with you.
I just tried it as I was receiving the same message, and I can vouch the solution offered by maduro-blanco WORKS.