After the website is upgraded to https, the http error is reported: This request has been blocked; the content must be served over HTTPS

HTTPS is HTTP over Secure Socket Layer, an HTTP channel aimed at security, so http requests are not allowed on pages hosted by HTTPS. Once it occurs, it will prompt or report an error:

Mixed Content: The page at ‘https://www.taobao.com/’ was loaded over HTTPS, but requested an insecure image ‘https://ift.tt/rWOwyG3’. This content should also be served over HTTPS.

After the HTTPS transformation, we can see the following alerts in many pages:

Many operations on https