Don't know why even after trying 5 to 6 times i cant pass the test even though i did it right but still cant pass their seems to be an error

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**

h1 {
  font-size: 68px;
h2 {
  font-size: 52px;
h3 {
  font-size: 40px;
h4 {
  font-size: 32px;
h5 {
  font-size: 21px;
h6 {
  font-size: 14px;

<h1>This is h1 text</h1>
<h2>This is h2 text</h2>
<h3>This is h3 text</h3>
<h4>This is h4 text</h4>
<h5>This is h5 text</h5>
<h6>This is h6 text</h6>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Challenge: Set the font-size for Multiple Heading Elements

Link to the challenge:

You are most likely running into the following issue, which is a warning on the Responsive Web Design landing page:

“Note: Some browser extensions, such as ad-blockers and dark mode extensions can interfere with the tests. If you face issues, we recommend disabling extensions that modify the content or layout of pages, while taking the course.”

Start disabling extensions until you find the one that is causing this.