Hi,
yes, I had a look, and It seems that there are two versions of the same playmaker 1.9.0p20 or something like that, or maybe it's because it was a previous version of Unity and upgrading unity broke something in playmaker, it's odd.
the solution is this,
1: reimport playmaker from the asset store.
2: make sure when you install it again to either not remove the folder PlayMaker/Actions/GuiElement folder.
publish and it will work, it worked here on my machine.
Bye,
Jean