After dropping these barrels from above, you’re supposed to walk over them to reach the goal. In RPG_RT (2K, JP), you can (the tile becomes walkable). In EasyRPG, you can’t.
Because this bug affects such a core part of the collision detection & there are so many possible configurations to test for, a fix for this will probably not quite make it into the next release.
So in the meantime, either revert to using the original RPG_RT for these cases or try to walk over in TestPlay mode.