HUB V3 reset. All devices off line now

I had an issue with the hub frequently disconnecting and then re connecting until eventually it would not reconnect. So I reset the hub and now shows as "connected " (via cable rather the WiFi which I was previously using). Trouble is all my devices are now showing as being off line even though they are listed as “connected”. Do I have have to reset each device? Thanks for any help you can give!

PS. Tried rebooting from IDE. Also unpaired one lamp and was unable to add it back in again.

Resolved the issue, but not the cause. Customer service no help. I removed all devices apart from one Fibaro and the Arlo stuff. Then re-paired. All lighting automations had gone as well. What a performance. One more time and thats it for me with Smartthings.