This prompt is triggered when the CFS system detects an unrecognized error. This situation may be caused by the following reasons:
The CFS firmware version is too low.
Restart the CFS system: Connect the CFS to the printer, turn it off and restart. If the version is too low, the printer system will force an upgrade of the CFS firmware version. Observe if it can return to normal.
Update firmware: Ensure that the CFS firmware is the latest version. If not, please update according to the instructions.
Power off and restart both CFS and printer, observe if the problem is resolved.
Check the firmware versions of the printer and CFS, ensure they are the latest, update if necessary.