No clue what I done. Orginally started creating a league without any mods. Decided to download the RW mod and use it instead. However now I can't not create a regular league. Tried doing sandbox and career. When I click next nothing happens. Only league that works is historical but then it hangs at 1% when creating the league. AFter about five minutes it's still sitting at 1%. So I decided just to do a single game and it loaded fine but right at tip-off I got this error and game quit responding. I've only downloaded and installed the real world mod and the GMGames 23 player pack.
My next step is until and reinstall the game without the mod.