Run Functional Tests using a Headless Browser fcc tests not passing even though mocha tests passing

Tell us what’s happening:
So I wrote my tests for this challenge, as well as the tests for the next challenge i.e. part 2
the tests pass when I run the server i.e. npm start, although when I place the same link in the fcc solution box, all the tests their fail, they don’t even execute, just one after the other go on failing, I’ve tried Chrome, Mozilla to pass, both have the same problem, everything seems correct, the link too is correct, I have attached screenshot of the same

Your code so far

Your browser information:

User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36.

Challenge: Run Functional Tests using a Headless Browser

Link to the challenge: