Quiz creation problem

Hi,

Up until yesterday everything went fine with adding and building new quizzes, as well as modifying existing ones. Now it is impossible to add new questions, as pressing the “add a new question” button only leads to jumping to the top of the page.

Additionally, questions that are already there from before cannot be changed, as there is no other choice in a drop-down menu.

I haven’t installed any new plugins. Tried to disable LifterLMS and activate it again, it did not work.

https://ww.wp.xz.cn/plugins/lifterlms/