Error when using this mod on a LAN server

[DarkFireNinja]

When i try to use this mod on a LAN server with my brother who doesn't have the mod installed (he is using Vanilla Minecraft), he gets this error when he tries to join my world:

**Connection Lost

Unsupported (vanilla?) client!
This server requires modded client to join!**

I'm using Quilt Loader on version 1.20.1 of Minecraft.

[Pacomatic1]

Also happens on 1.21 Fabric. If the client plays Fabric too, it says that there's a unrecognized registry entry or something, and highlights Wakes as the issue.
My guess?

The root cause might be that, when ran on a server, it forces the client to also have Wakes despite having no reason to do so.
And since LAN hosts a server, the others connecting will find that the server has Wakes, and will be told by the server that they need Wakes too.

To verify this, someone should set up a server with Wakes and join with Vanilla and Fabric (with no wakes) to see if this is true.
Also try joining said server with Wakes installed on the client, see if it affects the client even if they do have the mod.