for several months I had the issue that several Windows Apps (seem to be the native ones) are not able to connect with CIS installed. Most of my apps were working without any issues but as far as I can see, apps that are not using WWAHost don’t get any access.
What makes me wonder is the fact that even if I turn off all Comodo-Components (Firewall + HIPS + Auto-Sandbox) I get the error-messages. So I used format c:, reconfigured my complete system and the issue was still the same. There was no other Security-related software running except for Windows Defender.
As soon as I uninstalled Comodo Firewall and reactivated the Windows Firewall, every app was working fine again.
If you want to try it - it happend if I tried to used Flipboard (Flipboard is undergoing maintenance. Please try again later. For the latest status, follow @FlipboardStatus on Twitter.), Shuffle Party (Error -2101608440) or FOCUS Online. Every app has been installed via the German Windows Store.
Sorry for my limited English language skills.