So you mean since my PBX is on https, it will not work on http website?
Thanks for feedback.
Phone/video buttons are working for popout windows, you can check again but when I uncheck popout option. The phone/video buttons disappear on normal chat screen. Please have a look on provided images
Popout: http://www.micro-trends.com/microtrendswp/wp-content/uploads/2019/05/3cx-popout.png
Without Popout: http://www.micro-trends.com/microtrendswp/wp-content/uploads/2019/05/3cx-normal-chat.png
It only work if you have check on pop-out option from settings