I am on a Minecraft server with some friends. I had to download a modpack that the owner made themselves (all the mods are the correct versions, I checked), to use the server. I am also using prism launcher on MacOs for the VC mod in it if that makes a difference. However, every time I try to join the server, it always says the server couldn't config this specific mod. I'm not sure if it's a prism issue, Mac issue, or a mod issue, so here I am.

What was the fix?