10.0.3 update killed Time Machine backups

Since the 10.0.3 update around 6am this morning, every Time Machine on Big Sur 11.2.1 backup fails.  The last Time Machine backup that worked was around 5:30am.

Once the backup failed because target disk could not be found, the rest of the failures had no error listed.  I've rebooted the NAS and rebooted the MacBook Pro multiple times.  Nothing works.

Any suggestions?

spelling error fixed
[edited by: Brian Bresnan at 7:29 PM (GMT -8) on 11 Feb 2021]
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