Thanks for reporting, I have created an issue for it.
There is a fix for this with the MSGraph backend, but it only means that we can now read the actual error message.
Thanks for sharing. It looks like the problem is that the server responds “204 - No content” and Duplicati tries to parse the empty string, causing the failure.
However, it looks like this happens during cancellation of an upload, which means we are still looking for the actual trigger. Do you have a stack trace so I can confirm that this is what happens?
I have a PR ready that handles the 204 issue.
You can look at the message you want to suppress:
[Warning-Duplicati.Library.Modules.Builtin.HyperVOptions-HyperVOnServerOnly]
It has the format:
[Type-Tag-Id]
So, in this case, the id is HyperVOnServerOnly.
The plan is to add a button in the logs, so you can simply click it and say “Suppress this warning” and it will add the ID automatically, but for now you need to manually do it.
The name is hidden only when the advanced option is added, you still use the name when adding the option.
The message you quote here is actually also shown on the page.
The plan is to make a 2.2.0.1 release with fixes to some of the minor issues that are discovered.
This was already answered by @ts678, but you can just update from the canary to the stable.
Which version did you update from? I have no good explanation as to why it would suddenly skip ahead. Could it be related to the Daylight Savings time that happens around now?
It is not needed, but it does no harm either. The configuration files are considered “user documents” so they are not deleted if you uninstall Duplicati.