Nothing changed in BPS Pro 9.7 that is related to HTTP/HTTPS/SSL. Check that the WordPress https plugin is setup correctly. Check things like your htaccess code. Do the BPS Pro troubleshooting steps below to confirm, eliminate or isolate the source of the problem. Check your Security Log for any clues. Post any relevant clues after doing the troubleshooting steps and checking your Security Log. Also please explain your entire setup with exact specific technical details.
http://forum.ait-pro.com/forums/topic/read-me-first-pro/#bps-pro-general-troubleshooting