Quality Assurance and Testing with Chai - Run Functional Tests using a Headless Browser. I can't complete this. All tests are failed

Welcome, xSmilO.

We are aware of the issue:
fix(learn): Headless Browser Tests have incorrect values by nhcarrigan · Pull Request #40330 · freeCodeCamp/freeCodeCamp (github.com)

The only thing you can do is to skip this section, and move to the next. Once the PR has landed on production, you should be able to return and complete the challenges left.

Hope this helps