Html/css Lesson Two not working, Loads forever

I’m using a windows 10 64bit laptop using Microsoft Edge browser latest version I believe. The lesson asks me to create an h2 with the text “CatPhotoApp” and also that the h1 above read “Hello World”. When I press run test, it runs forever and doesn’t pop up “Success!”.

You may please provide the challenge link, also the code you tried and didn’t work? thanks.