Which exercise where you completing when you encountered the error. Also, at what point while running the Case Process do you encounter the error? What Case where you processing? If possible, please attach a screen shot of the browser when you encounter the error.
I am getting the same error (see below). None of the two bullets that you listed apply. I have been following the directions in the solutions which does not include either of those actions. I am currently on the exercise Create and Apply a New Work Status in the Principles of Flow Modeling module of the Business Architect Essentials (7.1) course
The property pyWorkPage.pyWorkParty(Owner) was of mode String while com.pega.pegarules.data.internal.clipboard.ClipboardPropertyImpl.getPageValue() was expecting Page mode. Details: (none)