Blue Post
Original thread hosted on Blizzard's official forums.
Unable to enter PTR, game version still seems incorrect
View on Blizzard forums:
https://us.forums.blizzard.com/en/d4/t/unable-to-enter-ptr-game-version-still-seems-incorrect/264829/10
This was caught early and corrected, but if you preinstalled, you may need to reinstall the PTR to get in. Those downloading after the fix should be able to get in.