Error: Failed to determine VM generation

Hello everyone

We use Veeam (Community Edition) on a lot of servers (mostly installed on a hyper-v host to backup VMs) and sure, we have an occasional error here and there. However this single server drives me crazy.

Some system infos: HPE Server, SPP installed, Server 2022 Standard (21H2), Veeam B&R 12.2.0.334 and Hyper-V installed. thats it pretty much.

Error: Failed to determine VM generation for Hyper-V host localhost: check if Hyper-V host is accessible and has up to date version of Veeam integration components installed.

I completely removed veeam once, installed it again, setup everything again (I didnt load a backup configuration on purpose). the very first backup worked, every backup afterwards gives said error.

there were no updates installed, reboots done in between the working single backup, and the following day it fails

dns error I can exclude, as we use localhost

rescan host and everything is successfull

I checked C:\ProgramData\Veeam\Backup\ log files birefly, but could not find anything suspicious

I searched here and on the internet, but could not really find a solution. what are my options from here?