Describe your problem and - if possible - how to reproduce it

The opening sentence of the challenge description says: "auto-fit works almost identical to auto-fill."
Here, "identical" should be an adverb with an -ly suffix because it indicates how auto-fit works. Similar usage found in "X behaves identically to Y" and "X acts identically to Y."

Add a Link to the page with the problem

https://learn.freecodecamp.org/responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit/

Tell us about your browser and operating system

• Browser Name: Firefox
• Browser Version: 60.0.2
• Operating System: Debian GNU/Linux buster/sid

If possible, add a screenshot here