Last tested: Aug 31, 2018
Scenario:
If your instance is self-hosted and is embedding Looker in an iFrame, and is receiving the following error:
Mixed Content: The page at '' was loaded over HTTPS, but requested an insecure resource ''. This request has been blocked; the content must be served over HTTPS.
Possible Causes:
Troubleshooting:
-- no-ssl
startup option --ssl-provided-externally-by=<s>
=
sign!X-Forwarded-Prot
adding a rule in the nginx for the proxy_redirect from http:// to https://
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