xFi Advanced Security Blocking Site Needed by Company

Hello,

My company has starting working from home recently. This has led us to notice an issue those of us with xFinity internet are having. xFi Advanced Security is blocking a site we use to host files for our company web site. The site is pro.ispring.com. I contacted them and they say they have a valid SSL certificate and we should contact you.

I am not sure the best way to handle this situation, any help would be greatly appreciated.

Thank you

Jason