WordPress Speed Up Service | WordPress Website Maintenance Packages Please provide a valid username., by zeddenit Trying to go thru the 5 minute install an no matter what i do it seems to say ” Please provide a valid username” I have used different usernames but to no avail. I have 4 other sites running on the same server and have never had an issue. I am using virtualmin and used their installer. and trying to run the installer gives me this error. Please provide a valid username.