TPLINK OC200 suddenly stopped working, Router sys log "DHCP Server rejected the request of the client". All we did is reorganize the server rack. HELP!

TPLINK OC200 suddenly stopped working, Router sys log "DHCP Server rejected the request of the client". All we did is reorganize the server rack.

While everything is on 192.168.0.1, the controller per the router says it's on 192.168.10.xxx

Factory reset did nothing, i'm so confused... Need to fix by monday...