No Data Available

I just updated my WordPress from 3.8 to 4.22 and WP-Pro Quiz from 0.34 to 0.36 and my list of quizzes no longer show up where I can edit the settings, the questions, etc. Instead, it reads “No Data Available”. The quizzes and questions are still in the database but they just aren’t showing up in WP-ProQuiz. What to do?

https://wordpress.org/plugins/wp-pro-quiz/