I had the same problem. You just need to add the key.
Exit out of Word.
In Regedit, find 'HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Word'
Add the key 'Last View', then in there add a D-Word 'WordViewStateUsePageStackArrangement', leave the value as the default (zero).
Restart Word.
Worked for me.