[Crash Report] You will not be able to enter the server

[rikuoman]

💡 Check the Bug Tracker and Crash Tracker before reporting a new crash. There you can find a lot of useful information and solutions for common problems.

Note: After placing an npc on an online server, you will not be able to enter the server again. The screen will show Internal Exception:io.netty.handler.codec.DecoderException: Unknown serializer type 83 If you turn off the mod, you can enter the server. (Sorry if the translation didn't work.)

Minecraft and Mod version 🐞 minecraft 1.20.1 forge easy_npc-forge-1.20.1-5.7.1.ja

Description of the crash 💥 A clear and concise description of what happened when the crash occurred.

Steps to reproduce the crash ⚙️

1.Put npc in the world 2.Trying to enter the world again 3.It shows “Internal Exception:io.netty.handler.codec.DecoderException: Unknown serializer type 83” and I can't enter.

Expected behavior before the crash ✔️ A clear and concise description of what you expected to happen before the crash occurred.

Logs 📝 To speed up the diagnosis, please provide the following files if possible:

• logs/debug.log debug.log

• logs/latest.log latest.log

• crash-reports/crash-...txt

These logs contain essential details that will help me identify the problem and offer more accurate assistance. You can upload the logs to https://gist.github.com/ or https://mclo.gs/ and share the link here.

Additional context 📋 Add any other context or information about the crash here.

[MarkusBordihn]

Thank you for the report. Generally, 'DecoderException' errors are client-side issues, so please ensure that the client and server versions are exactly the same.

If the problem persists with matching versions, I'll need the log file from the client that is showing this exception.

Interestingly, the NPC mod doesn’t send its own network packets during a client login, which suggests that the actual issue might be caused by another mod that is not handling the Easy NPC entities correctly. This means it might not be a direct issue with Easy NPC itself.

Additionally, the automated tests show no general problems: https://github.com/MarkusBordihn/BOs-Easy-NPC/actions/runs/11375077607

[rikuoman]

Thanks for taking a look. Is this the client log file? Sorry if it is different. latest.log

[MarkusBordihn]

Thank you for the file. Unfortunately, this log doesn’t show a crash, so there’s no clear indication of the issue. If you have a crash log, please share it, though based on this log, it doesn’t seem like it’s a 'true' crash, which likely means no crash log exists.

In the next update, I’ll add more information and make some changes to help narrow down the cause. However, at the moment, neither the server log nor the client log indicates that the issue is directly related to the Easy NPC mod.

[rikuoman]

I understand, thank you for your response.