When viewing the Newsletters page over an
https connection I am unable preview any newsletter. The dialog that is displayed is blank.
The error I get in the console is:
Mixed Content: The page at 'https://stackexchange.com/newsletters' was loaded over HTTPS, but requested an insecure resource 'http://stackexchange.com/newsletters/newsletter?site=stackoverflow.com&suppressPromotion=true'.
This request has been blocked; the content must be served over HTTPS.
When attempting to preview the Newsletters under
http everything works fine and the dialog is displayed as expected.