Did you check the page "running under proton/wine" under advanced topics? For me it worked after doing winhttp override described thereI've been trying to follow the guide(I'm running the game through Steam so under the Launch Options I entered the command to launch the run_bepinex.sh and all that), however when I try launching run_bepinex.sh, nothing seems to happen and configuration files under BepInEx/config won't be generated either.
Launching the game won't work anymore either.