Zigbee showing Not Detected, can't add any Zigbee devices

For the last few days I’ve been unable to add my Smartthings outlets and on the IDE for my hub it shows Zigbee as Not Detected. I’ve done reboots and has yet to fix the problem. I’m afraid the radio has failed. All ZWave devises are fine. Any ideas before I swap in one of my sub hubs as the new main and have to rebuild everything from the ground up?