What third-party scripts do you have installed/open?
I dont think I run any scripts in this case. I used a trim path on a shapelayer if that could be called a script in this case.
Otherwise I have a few scripts installed like RubberHose, duik, motion etc but these where not used in this project.
Are their Script UI windows open?
I'll get that message sometimes with certain ScriptUI windows open in my interface.
Are you still facing this problem? If not, let us know how you solved it. If so, please let us know so we can assist you further.