DaemonUmbra

Astral Sorcery's pom specifies a mapped Forge version, which may be causing issues. Try downloading the mod and using it from a FlatDir instead.

First, be patient and stop spamming replies (replied merged). Second, can you be more specific about what happens?

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Please keep this forum in English. Using mods should be as simple as installing Forge (you get the installer from our Files page) and dropping your mods into [Game Directory]\mods where [Game Directory] is selected by the "Installation" (I'm still annoyed about Mojang's naming of them, they're more like Profiles or Instances) and is defaulted to .minecraft.

Ok, I have no idea at all where that file came from but it's not the default... delete it

Do not learn Java through modding, it will be harder than learning it properly and will almost certainly corrupt you with bad practices before you've even started. This is not something that will be discussed, we do not provide basic Java education, we expect you to already have that.

This is a 1.12.2 log

Please provide debug.log (more info on where it is and how to provide it in my signature below, just expand the spoiler)

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Are you not getting a screen asking if you want to cancel or continue?

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Where did you get the mod from?

Have you played with infernal mobs in the past? Have you never set the Game Directory of any of your "Installations"? Have you never cleaned out .minecraft/config?

1.8 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

That's not the default file I get from the mod... is this config coming from a modpack?

Wonderful I had to track it down manually because atomicstryker isn't using the Forge config system... C:\Users\ophel\AppData\Roaming\.minecraft\config\infernalmobs.cfg

The Logs section of my signature below has info on where debug.log is and how to provide it, just expand the spoiler.

Proxies were used to separate side-specific actions so you weren't calling client-only code on the server where it wouldn't exist and would cause a crash. Nowadays that is handled mostly by sided event handlers. Everything you have in your proxies can be common or handled by sided event handlers. Most YouTube tutorials you'll find are utter crap. They tend to be "monkey see monkey do" and don't teach anything... they just go "do this, it works" and we get people wondering why it doesn't work when their issue is basic Java skills. Yes I could rant even more about this but I'd rather not.

C:\Users\Nazzy\AppData\Roaming\.minecraft\saves\1_16 Mods\serverconfig\reap-server.toml is the one to delete or revert changes to

Do you know Java?

We'll need the debug.log, check my signature for paste sites with a higher capacity

No, you should separate your modpacks into separate game directories, the game directory being the folder with the mods, logs, saves, etc. folders in it.

Are you following a tutorial of some sort? Proxies are an old pattern and there are now better ways to do what they used to do, also your use of them completely ignores the purpose of them.

Delete the build folder and right click the package explorer and refresh it

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.