Well the threas sais it.. with vanilla it runs but since the new launcher is there Optifine crashes when Java OpenJDK 15.0.2.7 is used I hope optfine can fix this ...
Tested with only Optifine and Scannable, the renderer seems to freeze when it activates. I can hear the game proceeding and give inputs, but no new frames are drawn. Even blindly disconnecting to the ...