Can't restore/backup the iPhone because the backup session failed.
Phone: iPhone 8 v iOS 12.3.1
iTunes on Windows 7 12.9.1.4
Following a failed update on the phone, I had to reset the phone, all ok.
The failed update was done via cable connection to PC/iTunes and iTunes backed up the phone so hopefully, there is a full backup of the phone's date saved just 3 days ago.
Problem is, I get the error message "iTunes could not restore the iPhone "iPhone" because the backup session failed" when I try to restore the phone from this back up, or any backup saved.
The iPhone connects to the PC/iTunes successfully, it sync's, I can explore the phone's contents via Windows, it just will not backup or restore this phone.
The phone will restore successfully from iCloud, but that backup is 6 months old.
So far I have tried;
uninstall/reinstall iTunes.
Reset the phone a second time.
Tried a different cable.
Switched off all AVG internet security functions.
rebooting PC, turning on/off iPhone.
Googling the error message just leads to sites who want to sell you the many iPhone repair apps.
So does anybody have any idea how to fix this?
iPhone 8, iOS 12