Fix in post 1
I just deleted the source plugin, downloaded a fresh zip and installed the source plugin manually back into 2017.4.2. Still having the exact same issue. Constantly looping [Script] :80: FileIOError: Write failed as soon as an asset download finishes.
Also manually importing .sbsar into the shelf is crashing the painter
Edit: Also deleted the source plugin folder in Documents/Allegorithmic/Substance Painter folder and relaunched painter. Still having the same issue
Edit 2: COMPLETELY re-downloaded a fresh copy of 2017.4.2 and reinstalled substance painter and the issue is still there... Please look into the fix again, i think you guys missed something