Cannot Create Backup Copy on Secure Storage Server. (4370359)

Cannot Create Backup Copy on Secure Storage Server.

Backups are being created successfully locally in the RMAD server, but the following error is seen in the console:

Error creating backup: Cannot create backup copy on a secure storage server.

Or, you may also see the following error:

Error while we take backup - Cannot create backup copy on a secure storage server. Attempted to perform an unauthorized operation. -2147164143

The RMAD console shows a red cross mark in the Secure Storage server.