Learn HTML by Building a Cat Photo App - Step 1 code is right yet will not pass

Tell us what’s happening:

I changed the original line to <h1>CatPhotoApp</h1> line in there and i didnt change any other lines so why is it saying its not passing? it aslo says you appear to be using a browser extension so i turned off adblocker and grammarly i dont understand what going wrong. i have coded websites in html and css before im doing this mainly for the certification therefor i know its not a syntax issue.

Your code so far

<html>
  <body>

<!-- User Editable Region -->

    <h1>CatPhotoApp</h1>

<!-- User Editable Region -->

  </body>
</html>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Challenge Information:

Learn HTML by Building a Cat Photo App - Step 1

Hello, resetting/refreshing the test page corrects this most of the time.
Note: the only way to know for sure is to run this in another browser, just a suggestion.

Your solution works from my end. Please try one of the following steps to move forward.

Click on the “Restart Step” button and force a refresh of your page with CTRL + F5 then try to paste the code in again.

or - Try the step in incognito or private mode.

or - Disable any/all extensions that interface with the freeCodeCamp website (such as Dark Mode, Ad Blockers, or Spellcheckers), and set your browser zoom level to 100%. Both of these factors can cause tests to fail erroneously.

or - Ensure your browser is up-to-date or try a different browser.

I hope one of these will work for you.