Question
Empty Assignement Key prevents course completion
This is about the course at https://academy.pega.com/library/83/system-architect-essentials-exercise-update ("System Architect Essentials Exercise Update (version 8.3)").
Section "6. User Interface: Exercise" doesn't come up in the browser (is skipped during the "Continue to the next lesson" transition, and presents an "Empty Assignment Key" message when clicked directly in the course overview -- see attached), and doesn't allow the course to be marked as completed.
NB: The section can be still followed using the PDF guide for the course.
Can you try logging out and logging back into Pega Academy? And if that doesn't work, can you try unenrolling and re-enrolling in the course? One of those actions generally clears up a problem such as this.