Restarting (or rebooting) your router or points can sometimes fix common issues.
Restart Google Nest or Google Wifi devices
Unplug the power cable from your Wifi device.
Wait 10-20 seconds for it to fully power off.
Plug the power cable back into your Wifi device.
Wait one or two minutes for it to fully power on.
For more to go:-
Google Wifi Installation
Google Mesh Wifi Setup