Server crashes on startup, alternatively you can join the server if it does not have the mod, but jumping in water causes the client to crash to the menu.

Server crash on startup log:
https://gist.github.com/MattB70/3fa0e914f69c598200643395c9425568

+1 on this

it wont get fixed most likely

cant reproduce with newest versions of the mod, if theres is any related problem please open a new issue

try new version for 1.18.2