rev slider not showing after switching domain to https

Hi there, I’ve recently installed SSL’s for my sites to make them more secure. After doing so, it seems that my rev sliders wont show and google console is giving me an error re: google fonts which I suspect is the issue.

Can you have a look and see what might the problem?

https://www.texaslonghornranch.com

Its interesting that I get the same mixed content errors on this site after installing the SSL but the rev slider shows. https://www.holisticpetcare.ca

any ideas?