[MC-140273] Netty Error

I'm in 1.13.2 and I would like to know how to debug this.

Environment

So I keep on getting this io.netty error where I can't join my server.

Proof:

[media]

Thank you for your report!
However, this issue is a Duplicate of MC-120362.

If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.

Quick Links:
☃D83D? Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki