Nuki state 255 via Openhab

i’m using my Nuki smart lock over Openhab 2.5.12 and the Nuki binding. It worked for a while but stopped working a few days ago. Restarting the binding doesn’t help.
In the logs i get always the warning:

 [WARN ] [internal.handler.NukiSmartLockHandler] - Smart Lock returned lockState[255]. Intentionally setting possibly wrong value 'OFF' for channel 'smartlockLock'!

What can i do to get it working again?

Best regards