Bus Simulator 21 FG not Working

[AB19162004]

FG Doesnt work and the overlay doesnt show too
im using Optiscaler version 0.6.7 final
the game just pauses when i press insert key

This Game has DLSS 2 support (nvngx_dlss.dll version 2.3.1)

RTX 3050ti user

--Rename OptiScaler's nvngx.dll to one of the supported filenames (I prefer dxgi.dll) [1].
--Copy the renamed OptiScaler file to your game's executable folder.
--tried disabling rtss overlay but to no avail
--i even tried changing upscalers manually using the .ini file but no FPS Boost as it should be

--i've seen FPS improvements by using uniscaler getting around 90-120 FPS but there's UI/HUD Flickering issue.

Done as said before and i didnt get a log file, where it should be located??

Thank You