#"Failed to Encode Packet 'clientbound/minecraft:custom_payload" 1.21 Networking Failure

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worldly fog
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Just started modding less than a month ago and am trying to get networking down for 1.21. I've set up a serverside payload with the playC2S and global receivers registered.

The payload is sent via keybind on armor inventory tick, but when the button is pressed on a singleplayer world, this message pops up and I am disconnected and sent to the server list.

Will provide code below.

image.png
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This is the error message given in the terminal on IntelliJ

Caused by: java.lang.ClassCastException: class snools.snools.networking.LaunchPayload cannot be cast to class net.minecraft.network.packet.UnknownCustomPayload (snools.snools.networking.LaunchPayload and net.minecraft.network.packet.UnknownCustomPayload are in unnamed module of loader 'knot' @4e9ba398)

glad oak
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!!code

reef yokeBOT
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You can use codeblocks in discord as shown below:
```java
code
```

You can also specify the syntax highlighting to use by specifying the language after the last backtick (`) on the top.

glad oak
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!!paste

reef yokeBOT
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Using a Paste Site

When sharing a large piece of code or a log, you should use a paste site instead of uploading a file or dumping it in a large codeblock.
Dumping your code/log in a code block or a message can make it difficult for other people to read previous messages.

Paste sites and their size limits:

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worldly fog
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oh my bad

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lemme do that

glad oak
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Did you implement custompayload

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That's still a file

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Use a paste site next time

worldly fog
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sorry, and if you're talking about the payload class yes i did

glad oak
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You're sending from server to client, so the client is recieving

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*receiving

worldly fog
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so it should be clientplaynetworking.playpayloadhandler instead of serverplaynetworking?

glad oak
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Also, you register the receiver in your client mod initializer because you're receiving on the client and not the server

worldly fog
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that worked for what I needed (I think? i dont have a server to test it on). tysm!

remote quarry
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c