GATEWAY > LOGIN ISSUE

I need to access my company's webpage through VPN but for some reason when I click on the link in the email I receive from my company or I go to the saved company website and click on the link I keep received GATEWAY>LOGIN screen!  I can get any where else but not this company page, seems Xfinity is blocking my access!  I've even reached out to my company's corporate IT department and they inform me that it's an Xfinity issue!

PLEASE I NEED TO ACCESS THIS PAGE as I have to respond to tasks that I have been assigned to!!