OK, first do you have the 'Generate report file' option enabled in the UI > Protection > Settings - Relevant scan (Full Virus Scan, etc.) Generate report file enabled.
Whilst this is generating a text based report file, I don't know if this isn't were the data is extracted or not.
Mine (on my win10 system) shows No Scan History, which is correct as I haven't done any on-demand scans for a considerable time. I have kicked off a Full Virus Scan so I will have to wait to see if it shows it in history.