warjort

https://github.com/MinecraftForge/MinecraftForge/blob/ab70bde1d648125acee073a93a25d4b8f08985c9/src/main/java/net/minecraftforge/registries/IForgeRegistry.java#L44 https://github.com/MinecraftForge/MinecraftForge/blob/ab70bde1d648125acee073a93a25d4b8f08985c9/src/main/java/net/minecraftforge/registries/ForgeRegistries.java#L68

That config file is broken, it's in the config subfolder. If you don't have a backup delete the file and it will be recreated with default values.

imm_ptl is immersive portals

But you are using Mohist, which is not Forge. Ask wherever Mohist provides support.

Read the FAQ at the top of this forum.

Now you are missing the architectury mod.

Try without optifine, if that fixes the problem then report the issue to optifine.

Tags don't exist until the datapacks are loaded. i.e. when you load a save or join a multiplayer game (the server sends you the tags). They are world specific.

Your problem is the ScudMissileMod trying to load client classes on the server. The mod author no longer supports that mod: https://www.curseforge.com/minecraft/mc-mods/scud-missile-mod and minecraft 1.12 is also no longer supported in these forums.

Issue with quark. I don't see a version of that mod that claims to be compatible with minecraft 1.20 https://www.curseforge.com/minecraft/mc-mods/quark/files

https://forums.minecraftforge.net/topic/125713-how-to-add-a-dependency-correctly/#comment-542048

Same issue, but different mods.

This issue has been asked many times before. Use the search function for possible solutions. It's basically some other mod breaking the game, but that midnight lib mod crashes the game when it happens. So you can't see the real error.

Issue with create, check you have the latest version then contact the mod author. But I would try without optifine first.

You don't need code or even a mod for that, you just need a datapack with a custom recipe file. Mods are automatically datapacks. Or you can create custom recipes with mods like Kubejs or Crafttweaker.

https://forge.gemwire.uk/wiki/Jar-in-Jar or similar "fat jar" builders

https://forums.minecraftforge.net/topic/125695-help-finding-duplicates-in-modlist/#comment-542027

Not enough animations is one of those client side only mods that has been crashing servers for years.

One of your mods has a broken custom recipe. It is not being serialized to the network correctly. The error does not say which mod. Probably the only way you will find the mod for this kind of error is to experiment with removing mods until the problem goes away. Backup your world before removing mods. If the mod is not just totally broken (i.e. the mod developer never nested multiplayer), this kind of error usually indicates you have a mod for a different version of minecraft?

If that's really the full log, the real error will likely be in the launcher_log.txt Don't post logs in the forum please. Use a file upload site.

With a log that short, the error message is likely in the launcher_log.txt

The "conflict" is eureka not finding the mod valkyrienskies or at least not being able to load one of its classes

Check you have the latest version then contact the mod author.

atio6axx.dll is the AMD graphics driver. You need to contact AMD or your PC manufacturer/supplier for help if you can't get your drivers working properly. Or a specialised forum devoted to PC/AMD support might be able to help you?

I have underlined above mods that might be the cause of your problem? Check you have the latest versions then contact the mod authors. NOTE: Minecraft 1.16 is not supported in this forum beyond trivial problems.