David, ws.mspbackups.com is the DNS name of the cloudberry API that your backup software uses.
You will see the GUI console, for example, report that it can't resolve ws.mspbackups.com if you disconnect your system from the network and then try to launch the GUI.
I would expect that "ws" stands for "web service".
You probably have internet connectivity issues, or at least DNS service issues on the affected system(s). That address definitely should be resolvable.