We had the same today. Due to the downtime of WHMCS we where also unable to login our back-end. If WHMCS is down, it may never ever have effected the service to our customers. But this happened today. We where unable to login our admin, to see support tickets etc. Due to license issue?? We paid all our bills and have a owned license. Till I discovered that WHMCS was down. I could not believe that because whmcs is down, our business was down! this is not professional.