I've seen several posts about this, but have not found a solution that works for me...
Registered users are getting a security warning: 'Although this page is encrypted, the information you have entered is to be sent over an unencrypted connection and could easily be read by a third party. Are you sure you want to continue sending this information?'
The first instance of when it occurs in when entering invoicing address. (There is an SSL installed on this site.)
Once the Country is selected Security Warning pops up. URL is http on this page.
Then it seems to randomly popup thereafter.
website is
www.harvestfarmbox.com
and free registration if offered if you want to try it.