Arlo Pro camera not uploading to the cloud

[SL52]

I have 4 Arlo Pro cameras that are 5+ years old and I have the free rolling 7-day Cloud Recording.  Three days ago, they stopped uploading to the could.  The cameras are communicating with the base station.  I have tried reinstalling the cameras and the base station without success.  I have confirmed that the base station has the latest firmware.  All three lights on the base station are green.  Any recommendations?

[SL52 · Accepted solution]

Success!  I read another string and followed JamesC's advise.  I power cycled the base station (which I had done before with no results) and then toggled the mode to "disarmed" and back to "armed" and bingo.  Recordings came back.  Thank you JamesC!