The bug where rewards couldn't be claimed after defeating a boss has been fixed via a rollback.
We sincerely apologize for the inconvenience.
If the update hasn’t applied yet, please try restarting Steam to ensure it does.
Temporary fix for a bug where rewards couldn't be claimed after defeating a boss
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.