The printer displaying the message: Cannot get the update channel, please restart the printer and try again.
Error name: Cannot set update channel
Error code: #10514
This is related to update channels for stable or beta versions of the firmware. The user can choose between a stable and beta version of the firmware, in Settings -> Firmware. The printer cannot read the current configuration or update-source. Most probably the printer configuration is somehow broken.
Update to the latest stable firmware version and/or factory reset.