I've played this game and finished it. But for some reason, when I exited the game, I realised that the steam cloud said it failed to sync.
I've tried:
1. pressing retry
2. reinstalling the game and restarting my PC
3. verify the files
4. repair library
And I still couldn't resolve the issue. I was so hyped to play because I recently bought LiS2 and reached episode 2.