Google Home finds no devices in SmartThings account

I have just added a new device to SmartThings (a Juno wafer light). When I try to link SmartThings in Google Home, I get the message:

“No devices were found in your SmartThings account”
You may need to set up these devices with SmartThings first. If you have already set up devices, they may not be available due to a temporary error. Please wait a few minutes and try again.

This has been going on for a couple days now. Have tried switching between base, no-5G (split out) wifi and Eero mesh network. Google and SmartThings installed on the same phone and I can use the Samsung app to control the light. Why is it saying ‘No devices’?