Unable to change directory to /httpdocs/: Invalid file name.

[Davo]

A very interesting bug that I have come across that I am posting for the benefit of other admins.

While navigating the directory structure in Plesk FileManager if you or your clients get this error, it means they have a file in the directory that uses special characters (eg. &).

To fix the problem, log into the server with TS or FTP and rename/delete the file that is using the special chars.

Cheers.