Logging into the VIP SSP or MyVIP Idp portal fails with error: "Could not sign you in. Try again or contact your administrator for help."
The SAML assertion signature has become invalid or corrupt. This can happen when a snapshot from a previous point-in-time is restored to a VM.
Log into VIP Manager and download a fresh VIP Certificate and install it onto the affected VIP Enterprise Gateway(s). This will initiate a fresh signing session between the VIP EG and the VIP Cloud. (Restart the VIP Enterprise Gateway services from the Windows services console, then log into the VIP EG console and restart the VIP SSP\MyVIP service, and any others pending a restart.