header is present on the requested resource.

This error message usually occurs when the server is configured to block cross-origin resource sharing (CORS). CORS is a security feature implemented by web browsers to prevent websites from making unauthorized cross-domain requests.

To fix this error, you can try adding the appropriate CORS headers to the server response. This can be done by configuring the server to send the following headers:

Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS
Access-Control-Allow-Headers: Content-Type, Authorization, X-Requested-With

The "Access-Control-Allow-Origin" header specifies which domains are allowed to access the server's resources. Setting it to "*" allows any domain to access the resources, but you can also specify a list of allowed domains.

The "Access-Control-Allow-Methods" header specifies which HTTP methods are allowed for accessing the resources.

The "Access-Control-Allow-Headers" header specifies which headers are allowed for accessing the resources.

Once the appropriate headers are added to the server response, the CORS error should be resolved.