What happens:

I have a lot of errors in the server log on start up.

Affected Versions (Do not use "latest"):

• EnderIO: 5.0.29
• EnderCore: 0.5.35
• Minecraft: 1.12.2
• Forge: 14.23.4.2705

Your most recent log file where the issue was present:

https://gist.github.com/Bulldog83/72a4d9032fb40386624cabcf15b852c3

Those are not errors, those are stupid messages from Forge.