Failed protection group rescan reports after upgrading to Veeam Backup & Replication 9.5 Update 4

Challenge

After upgrading to Veeam Backup and Replication 9.5 Update 4, you may start receiving failed protection group rescan reports saying:

No new hosts found.
[Error] Failed to process 1 host processed
 

Cause

This behavior is related to the introduction of an option to automatically assign licenses to all incoming standalone agents.

Solution

Currently this behavior is by design and may be changed in future releases.
As a workaround, you may go to Inventory node, right-click the Manually Added group and select Disable.