Domain Mapping Mixed Content Error

Getting Mixed content error when Divi Builder tries to load, the Divi Builder works fine, once Domain Mapping plugin is disabled.

I am using the latest version of Domain Mapping, please check the following screenshot:
https://static.livechatinc.com/8801096/P8MGP84P5N/6de9af0e3a00edf0d5dfc119e02b4762/scr32.png