I made a thread about this last night but I can't find it anywhere so I might as well make a new one.
I created a custom profile on the twitch launcher and put mods in it. It worked fine for a long time until I put some more mods in it and it started crashing on startup. Even when I removed the mods I added, it still wouldn't load the game.
I've tried googling it but nothing I can find works for me.
There's no crash report or anything other than "an unexpected issue occurred and the game has crashed" so I can't really tell what's happening.