You might be getting this error message in a variety of applications and webpages. It’s especially popular in commenting platforms like Disqus. You can solve it by using one of the fixes below:
Fix #1: Check to see if your HTTP Referrer is enabled
- Type about:config in the address bar
- Press Enter.
- Read the warning the press the button to go ahead.
- In the Filter bar type: network.http.sendRefererHeader
- The listing should appear in the results. Right-click on it and click Reset.
Fix #2: Check to see if any extensions are causing a problem with your HTTP Referrer
Disable all of your extensions in your web browser temporarily in order to see if one of them is causing the issue. If the problem is resolved then re-enable extensions one by one each time trying to reproduce the error in order to find out which one is causing the problem.