1. Somehow get the Error Code 0 to appear
2. Check your mods
3. Take out some mods and see if it works, it has to do with the mods you have. I've confirmed this when trying to use Forge 1.12.2 and I took out ItemPhysic, DynamicSurroundings, and SoundFilters.
4. Usually 3 fixes the problem quickly and allows the game to run but if for some reason it doesn't, try to remove some more mods to see what happens.
5. If all else fails, then somethings wrong with the Forge Version. Move or remove all mods from the mod folder and then try to play Minecraft with the Forge profile. If it still doesn't run, then the version is neither
1. Broken
2. Corrupted
3. Outdated Scripts
If this works, then you're welcome! I'm sorry if it doesn't work.