Why can i not move on to the next challenge?

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>
<p>Hello Paragraph</p>

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?

Which Challenge is this?

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