Is the switch set with a static IP or DHCP? Based on what info you shared, it sounds like the switch simply lost connectivity with the dashboard (cloud). I would first be inclined to look at the switch if it's set to DHCP or static IP then look at the uplink port to be sure it's set right with native VLAN and allowed VLANs.
The MRs likely followed suit due to the switch losing connectivity to the dashboard (cloud).
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