Troubleshooting CORS Issues
This applies to: Managed Dashboards, Managed Reports
Use your browser's developer tools, and check the console for errors.
If you are posting a message as in examples in this section or using the embed library to run script:
If everything went well, in the console you should see a message such as:
Running window message received from origin '[domain]' which was in the accepted list. If this was not expected, this might be an XSS attack.
If you see a message such as below, there was probably a problem with the CORS application configuration setting you entered:
Attempt to post message from origin '[domain]', but this is not in the allowed list from configuration. Post ignored.