If you're experiencing an issue with your LightWidget not displaying over https, it could be because this is a paid feature with that service. Luckily, with SnapWidget, https support comes standard with all our widgets, including the free ones.
Moving to SnapWidget and getting your Instagram widget working over https is easy and we'd be happy to help you with that.
First, you will need to create a new widget. Once you've created your new widget, you can add it to your website or blog.
Please let us know if you have any questions.