According to official support, CbB has been sunsetted and is no longer operational, meaning official activation servers for this specific version may no longer be supported.
If you are looking to continue using a desktop DAW from this ecosystem, you will likely need to move to the newer versions: Cakewalk Sonar bandlab cakewalk activation
To ensure you are fully activated and not in Demo Mode: According to official support, CbB has been sunsetted