Cant make my own server because i get an error

[kemal]

Hello everyone i have made a server with forge and have added pixelmon into the server. But for some reason i keep getting "Internal Exception: io.netty.handles.codec.DecoderException: Not enough bytes in buffer, expected 105, byt got 48". I tried upping the ram of the server to 2GB but it didnt solve anything. I have 16 GB of ram on my pc (where i host the server), but i cant seem to get it to work.

Pixelmon does work when i try to go into singleplayer, but for some reason just doesnt work online

 

Edit: server logs sais nothing aswell

[18:55:49] [ServerMain/INFO]: Environment: Environment[accountsHost=https://api.mojang.com, sessionHost=https://sessionserver.mojang.com, servicesHost=https://api.minecraftservices.com, name=PROD]
[18:55:50] [ServerMain/INFO]: Loaded 7 recipes
[18:55:51] [ServerMain/INFO]: Loaded 1271 advancements
[18:55:51] [Server thread/INFO]: Starting minecraft server version 1.20.2
[18:55:51] [Server thread/INFO]: Loading properties
[18:55:51] [Server thread/INFO]: Default game type: SURVIVAL
[18:55:51] [Server thread/INFO]: Generating keypair
[18:55:51] [Server thread/INFO]: Starting Minecraft server on *:xxxx
[18:55:51] [Server thread/INFO]: Using default channel type
[18:55:51] [Server thread/INFO]: Preparing level "world"
[18:55:52] [Server thread/INFO]: Preparing start region for dimension minecraft:overworld
[18:55:53] [Worker-Main-8/INFO]: Preparing spawn area: 0%
[18:55:53] [Worker-Main-8/INFO]: Preparing spawn area: 0%
[18:55:53] [Worker-Main-8/INFO]: Preparing spawn area: 0%
[18:55:53] [Worker-Main-12/INFO]: Preparing spawn area: 0%
[18:55:54] [Worker-Main-11/INFO]: Preparing spawn area: 31%
[18:55:54] [Server thread/INFO]: Time elapsed: 2344 ms
[18:55:54] [Server thread/INFO]: Done (2.865s)! For help, type "help"
[18:55:56] [User Authenticator #1/INFO]: UUID of player kemal007023 is 9a2a1dff-fa06-4e29-b57d-b1e6afb2db87
[18:55:56] [Server thread/INFO]: kemal007023[/xxxx] logged in with entity id 271 at (9.497695306619189, 68.0, 10.973182362716573)
[18:55:56] [Server thread/INFO]: kemal007023 joined the game
[18:55:56] [Server thread/INFO]: kemal007023 lost connection: Disconnected
[18:55:56] [Server thread/INFO]: kemal007023 left the game
[18:56:00] [User Authenticator #2/INFO]: UUID of player kemal007023 is 9a2a1dff-fa06-4e29-b57d-b1e6afb2db87
[18:56:00] [Server thread/INFO]: kemal007023[xxxx] logged in with entity id 272 at (9.497695306619189, 68.0, 10.973182362716573)
[18:56:00] [Server thread/INFO]: kemal007023 joined the game
[18:56:00] [Server thread/INFO]: kemal007023 lost connection: Disconnected
[18:56:00] [Server thread/INFO]: kemal007023 left the game

 

Edited April 28 by kemal

[kemal]

Oke i tried to download a different mod and try that out on my server and i get the same error. Now i know for a fact that my port forwarding and server is working properly, because i can join them without adding any mods into the server file, but then i dont know what i am doing wrong