Black screen after launching the game

[LostHope_Saki]

Try opting into the Steam beta under settings, I just did this and now the game seems to be loading with Steam still running.

Glad that worked for you! I've used the beta since before this issue aka 6.2 released, so for me that's sadly not an option to try. I really hope they at least acknowledge a problem exists rather sooner than later... I'm getting tired of waiting for fixes.