I'm sorry you're client is having trouble accessing her website. 501 errors can be difficult to diagnose, so we will need a little more information to troubleshoot this further. Please update your question or add a comment below with the following information:
While researching this for you, I did find one suggestion that recommends clearing the browser cache and cookies in the browser that is receiving the error.
We look forward to assisting you in resolving this error as quickly as possible.
|Email:||support@WebHostingHub.com||Ticket:||Submit a Support Ticket|
|Chat:||Click To Chat Now|