For a WebApp or Backend developers, mixing HTTP & HTTPS while testing a live API from their local environment or the opposite with live webapp connecting to a local backend does usually end with errors such as:
- Mixed Content Warning:
"Mixed Content: The page at 'https://example.com' was loaded over HTTPS, but requested an insecure image 'http://example.com/image.jpg'. This content should also be served over HTTPS."
"Loading mixed (insecure) display content 'http://example.com/image.jpg' on a secure page."