"Function not supported"...
... using deprecated framework calls, hmmmm?
Data security biz Veritas says that some users are unable to log on to its Backup Exec console" after installing the November or December Windows 2016 updates. It has patch removal workarounds to fix this. The logon error message, shown below, reads: “BackupExec Management Service was unable to start. Connection open and login …
Sounds like normal Backup Exec coding standards. It's 2016 and the software is probably still using, or trying to use in this case, Windows 3 components.
I don't know what it is about backup software but the designers and developers of them consistently seem to run with the opinion that any best practices, or even common sense, guides with regards to user interface design should be avoided at all costs.
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You don't back up to the cloud or use online backup software. Instead get yourself something which can be used offline. Also get yourself a cheap NAS or even an external USB disk will do, then you can plug it in and back up your stuff to it. Just leave your computer running for the night and you should be fine.