Hi gues, when i start my masnet note sentinel i get yhe error: " KeyError: Invalid Masternode Status, cannot continue. "  can anyone help me to start it? thank you

Hellow i have a problem with my masternode,o in the wallet and i give star on masternode and is saying that it did start but when i go at sentinel and i pus 1 to start the sentinel is giveing this erroe : "invalid masternode status, cannot continue" .... can someone help me to start my masternode please ?