If the Quick and/or Full Online repairs of Microsoft Office do not resolve the issue you must uninstall O365/Office > Reboot > previous version before the broken update using the correct file and try again. You be prompted to reboot again after installation.
:: Elevated Command Prompt to Block MS Office Upgrade
reg add "HKLM\SOFTWARE\Policies\Microsoft\office\16.0\common\officeupdate" /v enableautomaticupdates /t REG_DWORD /d 0 /f
reg add "HKLM\SOFTWARE\Policies\Microsoft\office\16.0\common\officeupdate" /v versiontoupdate /t REG_SZ /d 16.0.19231.20156 /f
schtasks /Change /TN "\Microsoft\Office\Office Automatic Updates 2.0" /Disable
schtasks /Change /TN "\Microsoft\Office\Office Feature Updates" /Disable
:: Undo Commands Remove the "enableautomaticupdates" policy value
reg delete "HKLM\SOFTWARE\Policies\Microsoft\office\16.0\common\officeupdate" /v enableautomaticupdates /f
:: Undo Commands Remove the "versiontoupdate" policy value
reg delete "HKLM\SOFTWARE\Policies\Microsoft\office\16.0\common\officeupdate" /v versiontoupdate /f
reg delete "HKLM\SOFTWARE\Policies\Microsoft\office\16.0\common\officeupdate" /f
schtasks /Change /TN "\Microsoft\Office\Office Automatic Updates 2.0" /Enable
schtasks /Change /TN "\Microsoft\Office\Office Feature Updates" /Enable
