On https websites when you access the settings of the widget, the following warning message can be found at the browser's console log:
Mixed Content: The page at 'https://example.com/administrator/index.php?option=com_widgetkit' was loaded over a secure connection, but contains a form which targets an insecure endpoint...
This warning is related to the newsletter subscription form, that is posting the data via HTTP instead of HTTPS.
On https websites when you access the settings of the widget, the following warning message can be found at the browser's console log:
Mixed Content: The page at 'https://example.com/administrator/index.php?option=com_widgetkit' was loaded over a secure connection, but contains a form which targets an insecure endpoint...This warning is related to the newsletter subscription form, that is posting the data via HTTP instead of HTTPS.