Error: Something went wrong during sign in
During sign in, WebMatrix downloads a management certificate in order to retrieve your websites and provision new websites with Windows Azure. Sometimes the certificate expires or needs to be refreshed.
Things you can try:
If your certificate is expired, please sign out and sign back into WebMatrix in order to get a new one.
If your subscription has expired or been deactivated after you signed in, please make sure your subscription is still active at the Windows Azure portal.
If your certificate has been removed from the portal, please sign out and sign back into WebMatrix.
If you are using a custom certificate that you imported manually, please make sure it is still valid at the Windows Azure portal.