The error occurs because of request. To resolve this error, you have a number of solutions like using a or using a browser with disabled few solutions to numbers. 'blocked a frame with origin "null" from accessing a cross-origin frame` `Cross-originn` `local web server` cross domain web security This article will discuss all the solutions to solve cross-origin issues. “ What Does the Blocked a frame with origin "null" from accessing a cross-origin frame” Error Mean Google Chrome has a security feature that blocks a frame with origin from accessing a cross-origin frame. If you see an error that says “Blocked a frame with origin from accessing a cross-origin frame”, it means that this security feature is preventing the content from loading. “ Why does blocked a frame with the origin "null" from accessing a cross-origin frame “ happen This can happen when you try to show material from another website on your own. This is referred to as a cross-origin request. So accessing directly from your browser without using a web service is not permitted for security reasons, if you could do this then it would be a major security vulnerability. <frames> The following is the error message you are getting: DOMException: Blocked a frame with origin "null" from accessing a cross-origin frame. error. “ How to resolve blocked a frame with origin "null" from accessing a cross-origin frame” Solution 1: Host your webpage on a local web server or use a different browser, such as Firefox. Solution 2: cross-domain policy disabled Run a browser with policy disabled. cross-domain web security/same-origin Disabling the same-origin policy is extremely risky and should never be attempted unless you are confident of what you are doing. Solution 3: Extensions like “xampp” or “Live Server” You could solve it by installing xampp and moving all files to htdocs or using an extension like “Xampp”. Solution 4: window.postMessage() method Remember that the same-origin policy prevents scripts from accessing the content of sites with different origins, and you can securely enable cross-origin communication between Window objects by using . window.postMessage() `postMessage(message, targetOrigin)``postMessage(message, targetOrigin, [transfer])` Browsers that follow the same-origin policy prevent scripts from accessing frames with different . origins.html Conclusion: Please keep in mind that turning off the same-origin policy (CORS) will only affect your browser. Also, disabling same-origin security settings in a browser allows any website to access cross-origin resources, which is extremely risky and should only be done for development purposes. Only now is the best way to interact between frames/iframes. window.postMessage()