CORS Error | WordPress.org

Can you please help me in this:

Access to fetch at ‘https : // analytics.webpushr.com/impression/session’ from origin ‘https : // example. com’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.