Unable to launch Diablo 4 from Steam after 1.4.2

After updating to 1.4.2 yesterday I’m unable to launch the game from Steam (or at all).
When I press play I instantly get a window that lets me report a crash with this ID:
9A6AB27C-4057-4120-B932-28925368912F
(Window is named Fenris)
And if I press the “relaunch” button I get a cmd window that points to
“c:\programdata\battle.net\agent\agent.8741\agent.exe”

After that the Battle net app opens and tells me that
“This folder does not contain the correct version of the game, please check the installation path and try again” ( BLZBNTAGT00000AF0)

I tried the game on battle net first via the xbox pass, then I bought it through Steam.
I’ve been playing for a few weeks without any problems but after yesterdays patch this happens every time.

After reading some more I realized I’m getting this in the Fenrir debug text file:

E 2024.06.10 14:52:46.743217 0 [Crash] Thread ‘SNOFilesAsyncLoad’ handling fatal error
E 2024.06.10 14:52:46.746511 0 [Crash] UnhandledExceptionFilter
E 2024.06.10 14:52:46.748393 0 [Crash] Crashed thread: ‘SNOFilesAsyncLoad’ (0x8b4)

I have uninstalled the battle net version.
I have reinstalled the Steam version.
What else could I try?