I've got a client. We are trying to get their ecommerce system to go out to an out to paypal to process the credit card orders. I've done this in the past, but it was a few years ago. Their server is an iis server onsite with an ibm midrange backend. Right now, I am hooking the front end code into the paypal. I am using the paypal button that opens a window to the paypal system. I'm using Visual studio 2015. I have ssl enabled. I am connecting to the site via the https url in the project properties. Firefox complains about there being a self signed certificate, but edge and chrome do not.
When I click on the button to open the PayPal checkout window, the window opens and then immediately. There is a small message that comes up and if i run click the button enough times, I can see that there is a message saying that the system is not being called from a secure site. The site is running from an https localhost on a non standard port. I think I have my client id for the sand box listed properly.
I'm looking for suggestions on how to get this working for the sandbox. any help is appreciated.
TIA. Wally