Doc examples for translations are not working anymore

[j2l]

Visiting https://formbuilder.online/docs/formBuilder/demos/translation/, when I, for example, edit the last example https://codepen.io/kevinchappell/pen/rmxYVW, in the console we can see that https://cdpn.io/kevinchappell/fullpage/assets/lang/ru-RU.lang is 404

Also, the image cannot be loaded because of mixed content: The page was loaded over HTTPS, but requested an insecure image 'http://formbuilder.readthedocs.io/en/latest/img/noise.png'