Failed to Connect to Server from Client

[Joematpal]

Client Error:

Failed to connect to server
Internal Exception: io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:login_disconnect'

Client: Minecraft.net 1.21.5

Server: ZeppelinMC 1.21.3

There are no logs (warnings or errors) dumped out from the server side either.

If the patch numbers of Semantic Version are not the same does that mean it will fail?

Is there way to get more logs?

[aimjel]

I believe the server only supports 1.21.3