How to Fix “Response to Preflight Request Doesn’t Pass Access Control Check” Error?


The “Response to Preflight Request Doesn’t Pass Access Control Check” error occurs when a website’s server does not allow a cross-origin request, or when the request is not properly formatted. This error can be fixed by following these steps:

  1. Verify the settings on your server

Make sure that your server is configured to allow cross-origin requests. If your server is not configured correctly, you may see this error.

  1. Use the correct HTTP method

Make sure that you are using the correct HTTP method for your request. If you are sending a POST request, use the POST method. If you are sending a GET request, use the GET method.

  1. Add the correct headers

Add the correct headers to your request. The following headers may need to be added:




  1. Check your code

Check your code for any typos, syntax errors, or other issues that may be causing the error. Make sure that your code is properly formatted and that all variables and functions are named correctly.

  1. Use a different browser

Try using a different browser to see if the error is specific to your current browser.

  1. Contact the website owner

If none of the above solutions work, contact the website owner to see if there is an issue with the website’s server. They may be able to provide additional support and assistance.

By following these steps, you should be able to resolve the “Response to Preflight Request Doesn’t Pass Access Control Check” error and successfully make cross-origin requests.

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