Almost All Quizzing Options Result in Errors

Hi there! I'm new to Storyline and am just getting started. However, I'm currently stymied by errors: I was initially trying to test out the Graded Question feature, but every time I choose it, I receive an error message. The same is true for Survey Question, Freeform Question, and Results (all of the Quizzing features except Question Banks). I receive the same error message when I try to access Content Library 360, but I'm able to use the Media and Text features in Insert. I've tried rolling back to a previous version and uninstalling in order to reinstall, but I received error messages there too which told me that I'm unable to do either of them. At this point, I feel like I'm stuck and can't really do anything. I'd appreciate some guidance into what I can do or try doing in order to get this to work properly. I can't rule out user error, but I really don't know what I could be doing wrong such that multiple core features of the software don't work. Thanks in advance for any help!