https://pastebin.com/TdE7u60z

It appears to have been triggered by newer builds of forge on a server end.

+1
https://pastebin.com/bm8Gc2HT
@iChun you free?

Same Issue here, am looking into trying to find a fix for this.

Good News and Bad News:
Good News: This Issue only seems to effect 2622 and 2623
Bad News: ATM, I don;t have a fix. Only work around is to stick to forge build 2621 or below

Ref: MinecraftForge/MinecraftForge@bdb65e9

More Good News:
By sheer Luck, I have found a Temporary Fix for this, though I'll test more in the morning

I am having the exact same isuue
@iChun please help.

Should be fully fixed now with #171 . Working OK now on Forge 14.23.2.2622 & 2623 :D

MinecraftForge/MinecraftForge#4783

Should be fixed once this is available to download :D

Bit late on this. This issue has been fixed by Forge in build 2624. Avoid 2622 and 2623.