Can't check for updates or manually update

When I try to check for updates under System / Update, I get a continuously blue circle (activity indicator?) and under the "INSTALL MANUAL UPDATE FILE" button I get a message that reads:

Code:

"b'': Automatic update check failed. Please check system network settings."

Network / Network Summery
re0
192.168.1.3/24
Default Routes
router 192.168.1.1...

Can't check for updates or manually update