I went ahead and tried it and was able to install the script in the interface perfectly. Yet, When I use it, unity crashes (and pops up the unity error reporting screen). Perhaps I am using the script incorrectly.
1-create an object with pro builder
2-add playmaker fsm to object
3-on first state, i add the probuilder instatiate action. (I asume that then i add probuilder behavior after this, but for testing I just added the isntantiate)
4-select the prefab object (the probuilder object to modify)
5-run my scene
Result, crash with error reporting.
I tried testing in an empty scene, and whne I run it, it loops a crating of unlimited prefabs (but did not crash). I assume that might be the cause of the crash in my original scene (perhaps out of memory).
Anyways, thanks for your help