Failed to decode packet login disconnect error message

[normal laurel]

Have you checked the forum and wiki to ensure your issue hasn't been resolved? Y

What launcher are you using? Curseforge

Which modpack are you using? Mayview as listed on Curseforge

Have you modified the pack in any way? N

What version of the modpack are you using? Beta 0.30

What version of the Java runtime are you using? 21.08.8

Have you allocated 6GB of RAM or higher? Not Sure

If playing with others, what method is being used to host/join the server? Bisect Hosting

If playing with others, have you confirmed that both the client and server are running the exact same version of the pack: N (Curseforge and the server say Beta 0.4.0, but my window says 0.3.0)

Describe the issue: I just went to play play the pack on Curseforge and it updated something first, but I'm not sure what. When I try and join the official community server I get this failed to connect message: "Internal Exception: io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:login_disconnect'". Everything else seems to be working as normal. I am on Mac.

Steps you've taken in effort to resolve this issue: I've looked up the message but it seems to be situational. I've repaired the profile on Curseforge in case that did something. I've restarted Curseforge and the pack. I tried looking through whatever I could on the server/pack's websites. I don't dare mess with the mods on my own, though.

Please help, thank you.

[ripe plover]

?logs

[dry carbon]

In order to better help you with your issue, we need to see your client's log file. To find the log files/folder:

• ATLauncher: Instances > BigChadGuys Plus > Open Folder
• Prism Launcher: Right-click your instance > Folder
• CurseForge Launcher: Right-click your instance > Open Folder

Double-click the logs folder and send your latest.log in this channel. If your game crashed, please also include the newest file in crashReports/

[ripe plover]

and i have a feeling curseforge did a bad install/update

[normal laurel]

This is all it says "[05Sep2025 00:04:27.593] [Render thread/INFO] [net.minecraft.client.Minecraft/]: Stopping!
[05Sep2025 00:04:28.068] [Render thread/INFO] [FTB Chunks/]: Shutting down map thread
"
Also same, I always get antsy when it's changing something and I don't know exactly what

[ripe plover]

?launcher

[dry carbon]

We recommend Prism Launcher as our primary choice of modpack launcher, as it's easy to use and supports a wide range of complex features that make modpack management a breeze!
For a quick guide on how to install a pack using Prism Launcher, use ?install.

We also provide support for ATLauncher.
We do not recommend you use CurseForge Launcher, for the reasons outlined in ?cf.
We cannot guarantee that we will be able to provide support if you use any other launchers, as we may be unfamiliar with them.

[normal laurel]

I'll check it out, thanks