In troubleshooting the problem "the "router time" is not available" I discovered that my Netgear R6300v2 router which I configured to run as a Wireless Ethernet Bridge (WEB) using Shibby MultiWAN (either R6300v2-ARM-138-AIO-64K or R6300v2-ARM-136-AIO-64K) is not able to get to the Internet: it can ping the statically configured default gateway 192.168.1.1, but it does not appear to recognize it as a default gateway to the Internet (ping to Internet IP addresses does not work). My PC which is attached to the WEB can get to the Internet just fine.
The issue goes away when I downgrade the firmware to an older, non-MultiWAN version (R6300v2-ARM—136-AIO-64K). As such I am guessing that I might have missed some WAN-related configuration steps when using the later MultiWAN version. Any pointer on what I might have missed would be greatly appreciated.