Read then remove this section:
Do not create an issue if you have not tried fixing it by using the latest version of the mod!

If you are reporting a bug regarding the interior view of the Machines, the one you get when you right click a machine, do not report it to any other mod author involved in the crash. It is highly likely that it is Compact Machines' fault.

Compact Machines version:4.0.0-beta.2
Forge version:1.16.5-36.0.54
I am not using Optifine: I am.
Link to Crashlog: https://pastebin.com/dLZ1hr9x

Description of the problem including expected versus actual behavior:
Problem: server crashes
Expected: server does not crash
Steps to reproduce:
restert server, place dia cube
we think its due to
a) player disconnecting in one of them
b) updating forge

Update, diamond cube is corrupted

Seems like somehow we have some code that is recursively being called. I'll check this out.