DaemonUmbra

Please reproduce the issue and provide debug.log, we need to see the game starting and the world loading up in debug.log (Note that if you haven't enabled Windows Explorer showing file extensions it will appear to just be "debug")

Single or multiplayer server?

Are you making mods or playing with them?

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

Are you sure you don't have a gamepad? No XBox controllers?

I don't think your current Forge version is compatible with Java 11, try Java 8-10

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

Where are you getting your mods?

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

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

launcher_log.txt would be in .minecraft rather than the logs folder, as it's not a game log

debug.log might have a clue, but from what I can see in latest.log, I can't tell

You have 32-Bit Java installed, uninstall it and install 64-Bit. https://adoptopenjdk.net

You're trying to load at least one client-only mod on a server, unfortunately these client-only mods don't auto-disable themselves on the wrong side and don't indicated their sidedness so Forge can't disable them

Universal is not what you want, you want the installer. (The term Universal used in this sense is an anachronism at this point) Please provide a screenshot of the message

Even if the game fails to launch or crashes before latest.log and debug.log are initialized, there will be launcher_log.txt

If it happens running the Forge jar, then: clear your logs folder run the server and reproduce the issue provide debug.log using one of the paste sites listed in my signature below

It means you're likely missing a mod. The confusing bit is Twitch is supposed to automatically handle that, provided the mod devs indicate their dependencies to Twitch (via CurseForge) correctly

This looks like one of your mods needs Scala but you don't have a mod providing it.

You started a vanilla server, I hope you have a backup

Run gradlew wrapper --gradle-version 4.9 twice and reimport

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

It's not a bug, it's someone relatively new to the core team not properly keeping things backwards compatible Edit: I take that back, it could be considered a bug Edit 2: Actually there hasn't been a first Recommended Build for 1.15.1 yet so things shouldn't be expected to be backwards compatible

You don't put it in versions, what video told you to do this?

Congrats, Optifine is using a field that Forge patches out and quite emphatically says not to use