Cafe Menu CSS lesson 18

Hello, I finished the CSS Cafe Menu except for lesson 18. When I click on lesson 18 it doesn’t give me any instructions and anything to click “check work”. I also refreshed the page and that hasn’t worked. I tried lesson 17 and moved on to lesson 18 hoping it would give me instructions but it did nothing. I can guess that lesson 18 is giving the body background color brown because lesson 19 makes you change the background-color to something else. Please let me know what I can do complete 18 so I can get the check of completion of the Cafe Menu CSS.