so hopefully there is a new hotfix to fix this bug.@fredlc unfortunately, that problem can happen on all platforms, not just on Xbox. Moved your post to the existing thread.
As mentioned before, it can be reported with the official website from CDPR support:
Xbox: https://support.cdprojektred.com/en...i-am-unable-to-complete-progress-in-a-quest-9
PS4: https://support.cdprojektred.com/en...-am-unable-to-complete-progress-in-a-quest-10
PC: https://support.cdprojektred.com/en...i-am-unable-to-complete-progress-in-a-quest-8
However, the website is down sometimes due to heavy traffic these days. So it sometimes gets you an error message. Anyhow the bug should be known at this point. But if you want to make sure you can send another ticket.
I'm not gonna start a new game for that.