After enabling the Web Traffic Redirection (WTR) component of the Symantec Endpoint Protection (SEP) client, Microsoft Store apps fail to connect to the Internet.
The SEP client's WTR functionality configures the client to send all Web traffic on port 443, and 80 to a local proxy service listening on port 2968. This traffic is then forwarded to the WSS infrastructure.
Microsoft apps (self-contained applications downloaded from the Microsoft Store) cannot connect to localhost by default.
This problem is fixed in the Web Traffic Redirection engine content 18.104.22.1682 and above.