DaemonUmbra

Run the jar manually in a terminal, what does it say?

Pretty sure simply using Reflection is also a viable option

Most of them are probably referring to the fact that Mojang ships a version of Java with the launcher, however this version is absolutely ANCIENT and is not registered with the OS at all.

You would get this error running Vanilla 1.14.4, Forge has nothing to do with it. Also you do know that any mods that require a server-side component won't work on Realms, right?

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

You have idea set to use Gradle in offline mode, open the gradle panel and click the button that looks like a split cross

What MC version are you using?

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Try removing Optifine

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Don't have exclamation marks in your paths

"No Mods" *Log shows Optifine is installed*

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

Really old Minecraft versions are no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

"I know 1.12.2 isn't supported anymore but I DON'T WANT to update, so please make an exception for me" That's not how this works.

It sounds like the setup was not completed and isn't being triggered for some reason. Unless I need to keep telling you to scroll up.

What do you mean "u don't need it"? You need Java to run the installer.

Anything above that?

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Are you playing through the twitch client?

Your issue was that you were missing mods.toml, now you've made a new issue for yourself. Look at the console, what does Gradle complain about above the final error?

None of this is debug.log and that launcher log shows a startup and nothing else. Please read the logs section of my signature

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