See https://github.com/openshift/console/issues/5098
Now the alert message is """ Catalog Source Removed The catalog source for this operator has been removed. The catalog source must be added back in order for this operator to receive any updates. """ Verified on 4.5.0-0.nightly-2020-04-28-235851
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:2409