Hi,
uhm, that's odd. I get that from time to time, when I rename scripts and similar actions. But I guess you haven't renamed scripts that are part of the ugui package right? You don't have any other errors prior doing this drag of the prefab?
- Have you tried reimporting the package? if not try, that might help.
- Can you try on an empty project as well? create a fresh project, import PlayMaker, and import this package.
else, pm me
Bye,
Jean