How to fix this error during client-server communication? Server sends data in JSON or XML format and client throws below exception. XMLHttpRequest cannot load https://crunchify.com/api/test. No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘null’ is therefore not allowed access. Regular web pages can use the XMLHttpRequest object to send and receive data from remote … Continue reading What is Cross-Origin Resource Sharing (CORS) – How to add it to your Java Jersey Web Server?