Mod Engine 2 will open for a split second then close right away, with bought game on Steam

[Eeo-1]

I've modded games before, either via direct installation or via Vortex, so this is a bit new to me. I'm not sure why, but having done a bit of research similar issues have been presented before and solved?, but specifically for people who didn't actually purchase the game or who didn't do so through Steam. Also potentially worth noting is that the .bat file for elden ring works fine, it's only the modengine2_launcher.exe that seems to be malfunctioning. Do I have to do something like manually directing the mod launcher via editing the .bat file for every mod, or is there something else I should be doing to get this to work properly?

[RPM12]

Experiencing the same issue. With both Mod Engine 2 and with the Anti-cheat toggler and Elden Mod Loader combo.