DaemonUmbra

What do you mean by "normal 1.12.2 minecraft"? Note: Twilight forest does nothing to the overworld.

What's the full output of the command?

Where do you get your mods from?

Please provide your debug.log, it has more info

Please provide your debug.log using one of the paste sites in my signature

Vanilla and Forge both use the system, however some generators that vanilla doesn't use need to be written (i.e. some things they already did manually ages ago so they didn't bother writing a generator)

Are you the one paying for internet in your household?

Did you change something above the line that says "Do not edit anything above this line"?

1.7.10 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

This is nowhere close to a complete log Please post your debug.log using one of the paste sites in my signature

Better Portals is broken, make sure you have the latest versions, if so report the issue to the author

If you remove Skyblock addons do you still have the issue?

Try removing warp mod

Congrats, you're learning things about outdated versions of both Minecraft and Forge

Does your PC username contain an exclamation point?

Please don't hijack other people's threads. If you have an issue please make your own thread.

you renamed the forge jar to server.jar?

But he prefers to play the game, not look at what actually makes the game work /s

I always advise against modifying the files manually unless you know what you're doing. How are you trying to change the Forge version and how can you tell it hasn't?

Post an updated log?

What are the contents of your run.bat file?

Is this with JUST Forge or are there other mods present?

Without a log or screenshot of that screen I can't tell you anything useful

Oh my lord you’re doing everything ass backwards

Did any of them say they require other mods? Please read the pages before saying no