When I try to launch 1.8.9-forge1.8.9-11.15.1.2318-1.8.9 - forge it crashes

At first I had a working forge but some mods didn't work on it so I tried getting a different forge so i dowloaded one and it installed fine but when i try to launch it the Minecraft launcher always says an unexpected issue occurred and the game has crashed but i can still run my optifine one and other Minecraft versions just fine its just the forge one.