The run test isnt working

Tell us what’s happening:
I am clicking run test a bunch of times, but nothing is happening. I’ve reloaded the websites a bunch of times and I even restarted my computer, but still, nothing happens. I typed the correct thing. I mean how hard is it to type “Hello World”. What can I do to fix this.

Your code so far

<h1>Hello World</h1>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/18.17763.

Link to the challenge:

I would try using Chrome or Firefox, the site may have some issues in Edge