"Warning - this display has not registered with your CMS" when reboot client device


I have xibo CMS 1.7.2 server and xibo 1.7 client on raspberry pi 4 model b 8gb with LineageOS 17.1 (Android 10). I registered client device to CMS server. All operations worked well.
But when I reboot client device, in status on the device, there is this message: “Warning - this display has not registered with your CMS. Please check that your CMS address is correct and that you have allowed this display a licence in the Display Management Page.”

I tried connect CMS again but the same error still occurs. On client device, i can access the CMS address in the browser.

How can I resolve this problem?

Below are screenshot of status display on client device and display management on CMS

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