Version Information

Minecraft Version: 1.20.1
Forge Version: 47.2.0
Nostalgic Tweaks Version: 2.0.0-Beta-8.4.1

Describe the Bug

On the forge version, when attempting to join a vanilla server or a server that does not have Nostalgic Tweaks present, the connection will refuse and say you need to remove the mod to be able to join. The fabric version works just fine under these conditions even if server-sided tweaks are enabled.

Crash Report

N/A

Bug Context

Tested with only Nostalgic Tweaks enabled and the same config.

Forge Error:
[15:51:24] [Render thread/INFO] [minecraft/ConnectScreen]: Connecting to mc.hypixel.net, 25565
[15:51:25] [Netty Client IO #0/ERROR] [ne.mi.ne.NetworkRegistry/NETREGISTRY]: Channels [nostalgic_tweaks:nt_forge_verification] rejected their server side version number
[15:51:25] [Netty Client IO #0/ERROR] [ne.mi.ne.HandshakeHandler/FMLHANDSHAKE]: Terminating connection with server, mismatched mod list
[15:51:25] [Netty Client IO #1/ERROR] [ne.mi.ne.NetworkRegistry/NETREGISTRY]: Channels [nostalgic_tweaks:nt_forge_verification] rejected vanilla connections

Screenshots

Fixed in beta 9. This will eventually receive a backport fix for 1.20.1.