Error 2020

Since couple of days I get an Error Message notification each night showing
Error ID: 2020

I do run Firmware-Version: 2.40.157

Anyone any idea ?

@Ralph_Buettner 2020 This board is for My Cloud OS 5. 2.40.157 is OS 3 but the is an Informational code “System Shutting Down” would be the same for both platforms.