[Geophil]

I have enabled TLS on my site. Although I've updated Settings>System, reCaptcha is still served insecurely from Google and so blocked by most browsers. What have I missed?

[Steven]

Can you provide the URL of the page so I can determine what parts are being served insecurely?

[Geophil]

The site is https://ingram-braun.net

The site performs well in Google's mobile friendly test. Secure image lowers the score, therefore shifting is not a preferred option.
The insecure URL is http://www.google.com/recaptcha/api/challenge?k=$key. I have observerd a referring TLS URL in the source code but I didn't manage to enable it.

[Steven]

Okay, can you try changing the "http" to "https" in the line below:

PHP Code:

<?php 

define("RECAPTCHA_API_SERVER", "http://www.google.com/recaptcha/api");