Oops, no such file exists! Double check the name and try again, merci.

Having this issue with all files in the Appearance Editor regardless of what theme is installed or active. This has been happening for several weeks – no one seems to be able to help me.

I have created a new site on same host, on different hosts, without plugins and have the same issue.

How do I resolve this error and get appearance editor functionality back.

All the files do exist as I can ftp in to edit them. But cannot in Appearance Editor.