Why does it crash when I submit?

I have completed all steps up to the last one, and whenever I hit run the tests my page goes unresponsive. Now i just want my certification that i deserve for doing many hours of this. Please tell me what’s up!

yes
https://www.freecodecamp.org/learn/responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document

The best page ever

The best page ever

Cat ipsum dolor sit amet, jump launch to pounce upon little yarn mouse, bare fangs at toy run hide in litter box until treats are fed. Go into a room to decide you didn't want to be in there anyway. I like big cats and i can not lie kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff. Meow i could pee on this if i had the energy for slap owner's face at 5am until human fills food dish yet scamper. Knock dish off table head butt cant eat out of my own dish scratch the furniture. Make meme, make cute face. Sleep in the bathroom sink chase laser but pee in the shoe. Paw at your fat belly licks your face and eat grass, throw it back up kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.

Thank you very much! Do I not get a certificate for completing that lesson? Or do I get the certificate after all lessons? Because I thought you get a certificate for that level