Stuck on 'Wait, there's more!' quest

[WAB]

I'm in the cave for the wait there's more quest and have blown up the rock in the way and collected all the things in there. I have also defeated all of the creatures that were in the way but apparently there is still more to do and I haven't been able to see anything in there 

[Oinkilus]

Well we are stuck at the same quest but different location, it says that there is another hack that needs to be done at the top of the trash bin.
but we cant proceed because we alrdy hacked it long ago