Forge pixelmon multiplayer crash

[nmn]

log
Crash report starts 1881
mc version 1.12.2

Once I join a server, I am immediately crashed out of the game after a brief moment on the server(~.5 seconds). Singleplayer seems to work fine and I am having no problems. I tried with installing on the technic launcher, and multimc(where I manually installed the mod pack). Both attempts have the same crashing issue in multiplayer. I also tried opening a single player world to LAN, there was no problems, I am not sure if this information is of use.

There was no problem with either instance before Aristois was installed; I had installed through forge 1.12.2 both times.

[Dyiing]

@nmn afaik pixelmon mp is a conflict. Not sure why