Can’t select questions from my quiz

Just downloaded the plug-in and trying to set up a new quiz.

After creating the questions, when I try to add them to my quiz, it shows the list of questions I created. But when I click the row, it won’t select it. Tried to click select all but still no luck.

Also, I haven’t got to the interval yet but there is a field for woo-commerce product which doesn’t seem to work either.

Any help would be appreciated!