I clicked OK every time I received an error message, I waited and finally the DCS window appeared.
Yes DCS can run after clicked message erreur but …
-I opened DCS from its native launcher, Pitools version kept having a flashing SteamVR window popping up 2-3 times a second, even after disabling auto-launch for SteamVR.
- when I checked on the fps counter built into the game , nothing changed after clicking default for me
I use ASUS GPU Tweak for my graphics card Asus Strix RTX 2080 Gaming