Could not get any response

Hi guys, I was testing how to call OneSpan api from POSTMAN using this steps mentioned in this link but I keep getting this error message: There was an error connecting to https://sandbox.esignlive.com/api/packages/. Why this might have happened: The server couldn't send a response: Ensure that the backend is working properly Self-signed SSL certificates are being blocked: Fix this by turning off 'SSL certificate verification' in Settings > General Proxy configured incorrectly Ensure that proxy is configured correctly in Settings > Proxy Request timeout: Change request timeout in Settings > General Any idea what I could be doing wrong.