First – the error is about changing some thing in the user admin, so the two actions you describe (change view raw GEDCOM for members back to no view ; and In FTP, duplicated xenea/images/facts folder and moved it to xenea/myFactsImages.) are not involved.
Something went wrong during your attempt to create or modify a new user’s account details.
I can see the error messages in the log file, but I can’t see what you are doing to cause them. Can you carefully recreate the error message and tell me precisely at what point the error occurrs?