Crash when creating new world-betterX-with most updated modpack

[fringe arrow]

I don't have anything else in the modpack other than the BetterMC and when I go to create a world, I crash. It is set on betterX because that is what my server currently has and i wanted to test it out on single player before updating the server with it. I'll attach my crash report.

[wintry forge]

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