Why can i not move on to the next challenge?

HTML-CSS
1 
Hello Everyone, for some reason when I click on the run tests button, nothing happens and I cannot move on to the next challenge even though I have done what it asks me to. Can anyone help?

Your code so far


<h1>Hello World</h1>
<h2>CatPhotoApp</h2>
<p>Hello Paragraph</p>
2

There’s a box that says “Your test output will go here”. When you run the test, does that box say that it was successful?

3

Which Challenge is this?

4

what browser are you using? try google chrome or firefox and if you are already using those verify that it is updated to last version