Cannot complete request when accessing HTTPS Storefront URL

When users access the storefront webpage they get an error saying "cannot complete request" on the detect workspace app / receiver web page...

CVE-2006-2643

Cross-site scripting XSS vulnerability in index.php in Monster Top List MTL 1.4 allows remote attackers to inject arbitrary web script or HTML via the usererrormessage parameter...

XSS in Monster Top List | MTL 1.4

XSS in Monster Top List | MTL 1.4 --------------------------------- Software : Monster Top List --------------------------------- version : Monster Top List 1.4 --------------------------------- Exploit : www.site.com/index.phpusererrormessage=XSS-CODE --------------------------------- Discovery ...