blocked by CORS policy Response to preflight request doesnt pass access control check No Access-Control-Allow-Origin header is present on the requested resource

This error occurs when a web application running in one domain tries to access a resource located in another domain. The CORS (Cross-Origin Resource Sharing) policy is in place to prevent unauthorized access to resources from different domains.

In order to fix this error, the server hosting the resource needs to send the 'Access-Control-Allow-Origin' header in the response. This header specifies which domains are allowed to access the resource.

If you are the owner of the server hosting the resource, you can configure it to send the necessary headers. If you are a developer trying to access the resource, you can use a proxy server to bypass the CORS policy. Another option is to use a browser extension that disables the CORS policy during development.