It’s converting just fine, it’s not able to access the destination drive/folder
ERROR> → Unable to move file B:\MCEbuddy Temp\working0\World’s Dumbest … - S14E13 - World’s Dumbest Brawlers 14.mkv to G:\TV Shows
Error :System.IO.DirectoryNotFoundException: Could not find a part of the path.
If you’re using a network folder you to enter the credentials or set it up such that the engine can access it from system space (not user space). See this FAQ for networked files.