Can't load mods alongside Seamless Co-op

[RondoRevolution]

I currently have Elden Ring setup to use er-patcher for ultrawide and to launch the Seamless Co-op exe, I also have this fork of ModEngine2 and Elden Mod Loader properly installed and working, there's only 1 other mod, Ultrawide UI Fixes inside the mod folder.

The issue is that to launch Seamless Co-op with er-patcher I need to edit modengine.toml and put ersc.dll inside the brackets of external_dlls, but doing so makes mods in the mod folder stop working.

Even if I launch the game normally, without Seamless Co-op, but keeping ersc.dll inside modengine.toml, the UI Fix mod I have in there also doesn't load, it only starts working when I remove ersc.dll from modengine.toml, but then Seamless Co-op doesn't launch at all.

Also, it needs to be exactly external_dlls = [ ersc.dll ], if I put ersc.dll between quotes, like external_dlls = [ "ersc.dll" ], it will not launch SeamlessCoop. I don't know why, but I thought I'd mention that too.

[Lunatik00]

Thanks to your question I got it to launch from the seamlesscoop exe file, external_dlls = ["SeamlessCoop\ersc.dll"] with the launch config WINEDLLOVERRIDES="dinput8.dll=n,b" %command% works for me, I will try now to add another mod on top of the coop, apparently is important to use backward slash for the folder name, it didn't worked with forward slash

[RondoRevolution]

@Lunatik00 I'm glad it helped you launch the mod. Have you tested with other mods to confirm if this issue also happens to you?