literally just as i describe, i went to put on an elytra and it just crashed the game, im not sure if its the same on forge i will have to test that

crash-2023-05-01_14.07.15-client.txt

crash report

Thats a very weird crash. Doesnt really give anything about the location of the issue, and I cant replicate it. Does it also happen if you remove the additional mods?