My two cents:
Same issue here, experienced today for the first time. Before, I was using the software on a regular base without any issue.
Changes made to the PC since the last time everything was running:
1) Updated Oculus Rift software (automatic update)
2) Installed F1 2019
Nvidia drivers v. 431.60 - Release date 23.07.2019 (with these drivers it was running some days ago).
FSX-SE works if I start it from steam without VR.
Uploaded my log file (I have no error log).
Thanks for you support!