try having a backup for your progress (the src folder)
put the back up files in desktop
then re run
gradlew setupDecompworkspace
and gradlew eclipse in cmd
on your workspace that should do the trick.
after both are done return the files back.
In my tutorial I said that the KeyInputEvent was fired on the FML event bus. You can see based on your import that it is from the FML packages. So you need to register your event handling class to that bus, not the main bus which you registered to.