@BenjiReis I tried to fill in the IP address with brackets, but then the discovery of the NFS shares fails. With regular SRs, it works fine without using brackets.

@PimAarts hi! Thx for the report - I reproduced the issue and am investigating. Meanwhile clicking on Cancel will give you access to XOLite

Yes, as long as the SR is not used by any other host/pool, it's safe to remove it. I'm talking about the SR NFS folder created by XCP-ng. Don't touch anything inside the folder except for entire removal of it.

@olivierlambert Without any change in the configuration, the backup now reports to be successful. Next step is to check whether the backups will restore correctly. The mystery still stands - what was wrong previously.