I am having a problem with the checkout cart where I cannot get to the second step of the checkout process. When I click on the “Review and Payments” button nothing happens as shown in the pictures below.
Page 1
Page 2 
I also do not see a next button at the bottom of the page. I know it worked at one point in the past because I was able to place a test order which I can still view on the backend. Since then, I have installed a new theme and an unrelated extension used to create a grid/list of subcategories on category pages. As of right now there are no error messages in the debug.log or the exception.log files. I also tried switching to the Luma theme and the issue was still happening there. I was wondering if anyone has an idea for what may be causing this.