Invalid Certificate Reported by Internet Explorer for Norton Safe Web for FaceBook

Good day.

I wish to bring to your kind attention that the following URL "https://apps.facebook.com/nortonsafeweb/?fb_source=appcenter&fb_appcenter=1" is reported as having an invalid Certificate in Internet Explorer.

Kindly assist and advise by investigating and addressing and resolving the issues.

Thank you and God Bless