DaemonUmbra

What launcher are you using?

What version of Minecraft?

Sounds like you either don't have Java installed or it's not set up properly

Please don't Necro old threads, if you have an issue make your own.

Please provide debug.log (more info in my signature below)

You can, we just won't help you if/when things go wrong

1. 1.12.2 is no longer supported, please update 2. You don't need a Windows-Specific installer, as long as you have Java installed you can run the regular installer like everyone else

This mentions a 1.12.2 mod which is not going to work with 1.16.1

Orespawn doesn't have a version for 1.16.1

EmbellishCraft is using Forge features added in 31.2.5 and is not properly indicating this as their minimum Forge version so Forge isn't showing a clear error screen.

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

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

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

That's a completely different crash caused by you not installing the dependency for one of your mods, also you have a 1.14.4 mod in 1.15.2

*sigh* In the Windows Explorer window click "view" and check the box next to "file name extensions". It's so utterly stupid that hiding the extensions is the default.

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

How did you close minecraft?

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

Please don't Necro old threads, if you have an issue make your own.

That's your installer log, nothing to do with actually running the game. Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Your optifine version is ancient. Get one of the more recent ones and check the changelog for the version of Forge it is designed to be compatible with

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

Optifine is a closed source mod and it's on them to be compatible with Open-Source Forge. OptiForge is a hacky mod designed to allow Optifine to run on Forge without Optifine themselves actually providing the compatibility and so cannot be relied on. I personally recommend not using Optifine at all, but if you must... please don't use OptiForge, just use a version that has a compatible Forge version in its change log, and if there isn't one, tough luck

Oh right, you already pointed it out. Toss everything and try McJty's tutorial

There is absolutely no reason for those setup() methods, what tutorial are you following?