Both the server and Minecraft was working before, but after a bit of hiatus, they stopped working. I literally sent my friend my mods folder, which is the same as the server's mods folder, but it works for him. I have no idea why this error started occuring. I don't want to remove the mod, it would ruin and mess up our world.

Here's the log:
https://pastebin.com/WsNXB9Mt

Version: 1.18.2

ive gotten the same issue once i added twlight forest.. remove it and loads perfect.
just to add some context here.
crash-2022-06-04_12.55.07-fml.txt

Same here, when paired with Twilight Forest. A friend is able to load the pack without removing twilight.

https://pastebin.com/XVsS6U9a

Duplicate of #5312