CTD during initial loading (before main menu), ntdll.dll

I somehow still have the crash. I am now on SU15 beta but the CDT on start up of the sim was there before, so I assume it is not related. I still cant even get to the main menu, when I do not have the VR headset attached (Pimax Crystal, does not matter if I have the software running or not).
What I tried to far:

  • SFC /scannow
  • Delete rolling cache
  • Empty community folder
  • Uninstalled GSX Pro
  • System reboot and Windows Update (as described here Fix for ntdll.dll crashes on Windows)
  • Running the sim under admin privileges
  • Executed the “Check and Repair” Feature in Xbox PC client software

Error Message is still the same:

Name der fehlerhaften Anwendung: FlightSimulator.exe, Version: 1.37.5.0, Zeitstempel: 0x00000000
Name des fehlerhaften Moduls: ntdll.dll, Version: 10.0.19041.3996, Zeitstempel: 0x39215800
Ausnahmecode: 0xc0000374
Fehleroffset: 0x00000000000ff349
ID des fehlerhaften Prozesses: 0x4e8
Startzeit der fehlerhaften Anwendung: 0x01da6a7eb3bbbbfc
Pfad der fehlerhaften Anwendung: C:\Program Files\WindowsApps\Microsoft.FlightSimulator_1.37.5.0_x64__8wekyb3d8bbwe\FlightSimulator.exe
Pfad des fehlerhaften Moduls: C:\Windows\SYSTEM32\ntdll.dll
Berichtskennung: e5e35af5-629c-45a1-8d77-6416e0ef802f
Vollständiger Name des fehlerhaften Pakets: Microsoft.FlightSimulator_1.37.5.0_x64__8wekyb3d8bbwe
Anwendungs-ID, die relativ zum fehlerhaften Paket ist: App

The mentioning of couatl is not there anymore since I uninstalled GSX pro but was also not related before: MSFS CTD Couatl64_MSFS.exe

The CTD happens in safe mode and normal mode.

Any help?

EDIT: I just tried to reinstall MSFS completly, and even during the reinstallation I get the same CTD with the error message pointing to ntdll.dll…