Any suggestions to sort out SSL (https) issues??

Your help would be greatly appreciated!!

I have a booking system, which I’d like to set-up on a https page. I’m using the WordPress Https plugin, but I believe the booking system script is causing the insecure issue…

Link – https://www.bournemouthairportparkingservice.co.uk/parking-form/

Thank you!!

https://ww.wp.xz.cn/plugins/ssl-insecure-content-fixer/