Forge Version: 36.1.0
Minecraft Version: 1.16.5
Psi Version: 1.16-91
Epic Fight Version: 3.0.4

Works fine in singleplayer, but when I try to add it to my modded server, it crashes on startup.

Error: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/tileentity/ItemStackTileEntityRenderer

Full crash report below:
crash-2021-03-17_20.18.45-fml.txt

Ah, I failed to account for multiplayer. This should be relatively easy to tackle.

Thanks for the heads up about this, it should work fine for all your server needs now! :D

Great, can't wait to use this for multiplayer! Cheers.

A different issue has popped up, Epic Psi causes a server-side crash when joining a world or server.

Server crash report: crash-2021-03-19_07.23.38-server.txt

Singleplayer crash report: crash-2021-03-19_15.36.49-server.txt