https://twitter.com/PUBATTLEGROUNDS/status/938646804182241281
PLAY BATTLEGROUNDS　@PUBATTLEGROUNDS
We are aware of crashes occurring for some players when starting the game and our engineers are working on a fix.
We will inform you once the fix has been implemented. Apologies for the inconvenience.

そのSSE4.2に起因する問題が解決されるかどうかはわからんが何かしらの対応はしているようだ