Hello there,
From what I have seen, this lesson has no issues. In order to help debug, we will have to see all of your code. Would you mind sharing a link to your project code?
However, the next few lessons do have an issue:
Quality Assurance and Testing with Chai - Run Functional Tests using a Headless Browser. I can’t complete this. All tests are failed - General - The freeCodeCamp Forum
The PR to fix has been accepted, but is not on production yet.