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The 403 error typically indicates that the client is not authorized to access the requested resource. This error is often related to authentication or permission issues.

To resolve the 403 error, you can try the following steps:

1. Check if the client has the necessary permissions to access the "import" endpoint. Make sure that the appropriate roles or permissions are assigned to the client.

2. Verify if the client is authenticated properly. If authentication is required to access the endpoint, ensure that the client is providing valid credentials or tokens.

3. Check if there are any security configurations or filters in place that may be blocking the client's access. Review the security configuration of your application and make sure it allows access to the "import" endpoint.

4. If your application is behind a reverse proxy or load balancer, ensure that it is properly configured to forward the request to the correct server and port.

5. Check the server logs for more detailed information about the 403 error. The logs may provide additional insights into the cause of the issue.

If none of the above steps resolve the issue, you may need to consult the documentation or contact the support team for the application or framework you are using for further assistance.