I have installed raven via npm and are trying to send error but get the following error in the browser:
XMLHttpRequest cannot load https://sentry.io/api/******/store/. Response to preflight request doesn’t pass access control check: Credentials flag is ‘true’, but the ‘Access-Control-Allow-Credentials’ header is ‘’. It must be ‘true’ to allow credentials. Origin ‘https://MYDOMAIN.com’ is therefore not allowed access.