Invalid regular expression flag s

Every time I run the test it says
“SyntaxError: invalid regular expression flag s”

Is this up to me or some bug?

Your code so far

<p>Click here to view more <a href="#">cat photos</a>.</p>

<a href="#"><img src="" alt="A cute orange cat lying on its back."></a>
<p>Things cats love:</p>
  <li>cat nip</li>
  <li>laser pointers</li>
<p>Top 3 things cats hate:</p>
  <li>flea treatment</li>
  <li>other cats</li>
<form action="">
  <label for="indoor"><input id="indoor" type="radio" name="indoor-outdoor" value="indoor" checked> Indoor</label>
  <label for="outdoor"><input id="outdoor" type="radio" name="indoor-outdoor" value="outdoor"> Outdoor</label><br>
  <label for="loving"><input id="loving" type="checkbox" name="personality" value="loving" checked> Loving</label>
  <label for="lazy"><input id="lazy" type="checkbox" name="personality" value="lazy"> Lazy</label>
  <label for="energetic"><input id="energetic" type="checkbox" name="personality" value="energetic"> Energetic</label><br>
  <input type="text" placeholder="cat photo URL" required>
  <button type="submit">Submit</button>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0.

Challenge: Nest Many Elements within a Single div Element

Link to the challenge:

does it says something else after that? there should be more to the error

No nothing. And even if I enter another exercise it says the same.

When I run your code, it passes all tests. Is your browser updated to the latest version? Do you have any browser extensions running?

I have the same problem!! i got stuck by it.
(and it’s my third time that showed me the same error)

could you open the browser console and see what error you see there?

Thx, I just updated firefox and It works instantly

I’m glad to hear it. Happy coding!