DaemonUmbra

Are you sure you have Java installed? If so try running JarFix once and then try again.

What tutorial are you following?

The file specified will not exist on any website, it's a file that gets generated by ForgeGradle, have you changed your build.gradle?

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

Are you a BT or Comcast customer?

1.7 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.

Maybe

Do you have any data or resource packs installed?

You know the logo file doesn't replace the Minecraft app icon, right? It just shows in the mod info page. Your earlier messages indicate you are aware of this even though your last message suggests otherwise. This is examplemod.png in the root of src/main/resources showing in the mods listing: If you tried this and it didn't work please provide your workspace in a GitHub repo.

Is anything different if you try the latest version of Forge?

How long have you allowed it to sit on the white screen?

This is not debug.log, this is latest.log

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

HervestDropsEvent is nonfunctional and should be getting replaced by global loot functions soon if it hasn't already

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

Don't bump, especially not less than an hour after your post. Make sure you have Java installed correctly, then run JarFix once and try again.

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.

If you're referring to BuildCraft robotics, which I see in the log, that looks like a pre-1.13 mod, please make sure you're only using mods designed for the same version of Minecraft that you're using.

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

Is accidentally hitting the little red X really an issue for you?

I believe it's possible, but I don't know of a mod that does it and I can't imagine it'll be pretty

This smells of YouTube video.

Problem with BonsaiTrees2, also note that you are using at least one mod that was made for a different version of Minecraft from the one you are using.