I followed the documentation (https://docs.minecraftforge.net/en/1.20.x/networking/simpleimpl/) for creating a packet handler. However, as shown in the images below, I have found out that "'net.minecraftforge.network.NetworkRegistry' is marked unstable with @ApiStatus.Internal". Strangely enough, when I created a previous mod for Minecraft version 1.20.4, I did not encounter this problem. My Forge version for this mod is 49.0.27, so I believe some things have changed. Is there a new correct way of creating a packet handler?

Edited May 3, 20241 yr by LeeCrafts

I have found out that I may need to use the ChannelBuilder class:

public static final SimpleChannel INSTANCE = ChannelBuilder.named(new ResourceLocation(SkeletonBowMaster.MODID, "main")).simpleChannel();

However, I am not marking this post as "solved" just yet, as I have not tested the mod.

Edited May 3, 20241 yr by LeeCrafts

Here is a tutorial; this is what I used.
1.20 Minecraft Forge Modding Tutorial - Packets