If it is not possible to manually adjust the device’s date or time anymore, please check the actual date compare to the firmware compile date and time. The compile date and time is visible below the SIUS Logo after startup.
If the firmware version of the CU951 is CUOS 1.8.0 or older and the actual date is before the compile date and time please update your range to CUOS 1.9.0 with the SIUSLoader. This will fix this issue.