playing this in 1.16.4 to have more mod compatibility. Also playing on a server, when a friend tries to connect when a water wheel / anything that moves is in operation, they crash with the following error log.
crash-2021-02-08_16.37.17-client.txt

Once he gets in, it can be operated and put in motion, but trying to enter the server when operational crashes his game entirely. i also suspect that, if i restart the server with the entities in motion, it might not open again. i assume this will also happen to me if i try to re-log into the server whilst its operating.

I am having the same issue but on a single player world

i managed to fix it, you are probably using the latest forge version (forge blablabla.37) you have to go back one version, to the one ending in .36

Okay awesome I'll try it out

I managed to fix it, you are probably using the latest forge version (forge blablabla.37) you have to go back one version, to the one ending in .36

the fix works for me I had the same the problem

i use the curseforge launcher, so its very easy to make new profiles and change the forge version on the fly.

you just install the previous version normally as a new profile and that's it i think, just pray none of your other mods break, they probably won't.

I was having this same issue, thanks this helped!