Am having the same issue. have created a ticket Academy Support, but am not optimistic that I will hear anything soon. My entire training is held up by this problem that has existed for years and UiPath have never done anything about it. Really, really reflects poorly on UiPath
In Fact, this persistent problem with automated grading is an excellent example of why we can’t just replace all human workers with bots: Because there are some tasks bots just can’t perform (apparently including grading these assignments).