Connection Not Private Error When opening via Facebook


I received a message from a customer that tried to access my website via the in app browser from fb and she gets a “connection not private” error and warns her away from accessing my site. How can I fix this? It seems to be working fine other wise. Please help, as most of our business comes via fb. www.tasteandseefarm.com

My customer has also tried typing in from her mobile and computer the link direct and gets the same error.