I downloaded the latest 1.8.9 forge mdk (1.8.9 - 11.15.1.2318) and then ran "gradlew setupDecompWorkspace" and "gradlew eclipse".
But when i open eclipse it says "the import net.minecraftforge.fml cannot be resolved"
Also, when i try to run "gredlew build" it fails.
I've been trying to setup this for hours.
Just please help.