Arlo Pro Base Station was connected, now isn't

[Milwauken]

I've had my Arlo Pro base station for about six months, and it has worked fine with two cameras. Today I tried to add two more cameras, and now I cannot connect to the internet. I have two green lights, but the camera light (on the right) is amber.

I've followed the instructions for reconnecting - unplug and plug the base station, 10 second reset button. I'm using Arlo's ethernet cable, and it's securely plugged in at both ends.

When I try to sync station to camera, I get all the appropriate lights. The amber light on the station turns green and flashes. I press the sync button on the camera, and the blue light flashes. But then the green light on the station turns to amber, and I still get the "Not connected to the internet" message.

Any ideas? Thanks in advance

[Milwauken]

Update:  Chatted online with helpful Arlo tech and problem was solved. Deleted the base station and cameras and started over. Two hours later, the base station went offlne by itself. The router works fine. I tried a one minute reset, nothing.