Tried the new 3.5.1 Topaz video, MacBook Pro M1 Pro 16 GB, gives a red cross error in the output panel and advises to seek help here with the Topaz log files.
Update: Reset with the reset button in preferences seem to get it in working state again.
Thanks for the logs. It looks like the app was set to export items to a location that was no longer available, so resetting the app preferences would resolve this.