I am using StorageGRID Version 11.7.0.5 from Netapp.
Also I am running the latest VBM365 with the newest patch (Build: 7.1.0.1401)
The Jobs on a bucket without object lock work without problems.
Unfortunately, the backup copy to the immutable bucket does not work.
I have this behavior with 2 independent installations.
The following errors occur immediately in the job

Error Messages:
Unexpected XML attribute of Retention: xmlns:xsd
Error: The remote server returned an error: (400) Bad Request.
I was able to create a bucket with object-locking and versioning enabled on StorageGrid

It Veeam support ticket is open, but the support currently suspects the problem with the storage vendor.
Since I already have the identical problem with 2 customer installations, I wanted to ask if anyone here has similar problems?
Thanks and best regards,
Andreas