If you are a Comcast user and are having problems with Text Messages within CoolFocus, first try turning your modem and router OFF by unplugging for 5 minutes, then power back up. If that does not resolve the problem, follow the steps below:
Go to my.xfinity.com.
Along the top there are menu items (My Xfinity, Shop/Upgrade, Support, My Account), then there are icons. Email, TV, Home, Internet (looks like Wi-Fi), phone, etc. Click the Internet/Wi-Fi icon. You may be asked to sign in along the way.
There is now a 2nd level of menus. Overview, People, Devices, Help, More. Click More.
Scroll down to see Security Settings. All your problems lie with "Protected Browsing". When enabled, it caused the problems.