These errors occur when attempting to mount a VOB (first msg) or start a view (second msg) from the CLI for a VOB and/or view whose server has either had its name changed or is not available. The GUI error message is null. That is, a CC error box pops up, but there is no error message.
If the server that owns the view/VOB has had its name changed, the view and VOB global paths will have to be reregistered and retagged.
# ct unregister -view -uuid UUID
# ct rmtag -view view-tag
# ct register -view view-storage
# ct mktag -view -tag view-tag view-storage