Uncaught Error: A cross-origin error was thrown. React doesn't have access to the actual error object in development

Question

Everytime I submit a zone, It display this error \'Uncaught Error: A cross-origin error was thrown. React doesn\'t have access to the actual error object in development\' It

Answer 1

Closing the application window in other browser instances could help with this error. Specifically the error is related to the browser behavior described here: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS.