Forge not opening correctly

[TheNamesJulian]

Hey everyone, so I downloaded Forge 1.12.2 and got the installer to work and the version is on Minecraft, but when I try to open Minecraft with the forge version selected, it won't work. It'll say the game is already open and running but it isn't. Anyone know how to fix this?

[LexManos]

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.