Alexanator16

I really want to make a 1.16.3 modded world because of some cool mods, but for some reason (and I’ve tried all of them) 1.13 - 1.16.5 versions crash on upload and they barley even get started, there is 0 crash notes or anything just says sorry for your inconvenience but so and so version crashed. 1.12.2 and down all work perfectly fine and I have no clue why. Pls help.