Okay. Running the command 'engine-setup --offline' fixed the certificate problem
without upgrading the engine.
While engine-setup was running it made reference to the following page regarding PKI
certificates. I'm posting it here for reference by other people who may encounter the
same problem I had.
https://www.ovirt.org/develop/release-management/features/infra/pki-renew/
Thanks again for the help. Feels good to be back up and running. LOL