Hallmark Movies Now not working through xfinity internet

Anytime I try to log in to Hallmark Movies Now with my xfinity internet nothing loads and I get "this page is unsafe" messages.   If I turn WiFi off on my cell phone and use my cellular data everything Hallmark works fine. All other internet sites and devices work for everything else, only Hallmark seems to be blocked.   Any solutions??? Please don't give me the reset the router spiel as like I said everything else internet wise is working and I always seem to have more problems after a router reset than I did before.

Thanks in Advance!