This is the error I am getting.
I am embedding the URL in the iframe.
Mixed Content: The page at 'https://admin.paypenny.io/pages/dashboard' was loaded over HTTPS, but requested an insecure frame 'http://paypenny-metabase-lb-1221215848.ca-central-1.elb.amazonaws.com/embed/dashboard/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJyZXN
and when I tried to change the site_url, it was not present in the general tab.