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The following steps can be taken to resolve the CORS policy error in React:

1. Use a CORS proxy: You can use a CORS proxy server to bypass the CORS policy. There are multiple libraries and services that offer such proxies, and you can pick one that suits your needs.

2. Update server configuration: The issue might be with the server configuration itself. Therefore, modifying the server settings to allow cross-origin resource sharing can also help resolve the error.

3. Use JSONP: JSONP (JSON with padding) is a technique that allows you to bypass the CORS restriction by loading the data as a script tag. This technique can be helpful in resolving the error in cases where server configuration changes are not feasible.

4. Modify headers: If you have control over the server, you can add the "Access-Control-Allow-Origin" header to enable CORS. This header specifies which domains are allowed to access the server resources.

5. Use a proxy server: You can use a proxy server to forward requests to the server that does not allow CORS. This way, the requests are not blocked by the CORS policy.

6. Use a middleware: You can use a middleware like "cors" in your Node.js server to enable CORS. This middleware adds the appropriate headers to the server response, allowing cross-origin requests.

Overall, these steps should help you resolve the CORS policy error in React.