OutlookGoogleCalendarSync: Crash on startup - fails to connect to running Outlook instance

OGCS Version: v2.8.0.0
Installed or Portable: Installed

Problem Description
On starting OGCS, it crashes straight away when Outlook is already running.

Steps to Reproduce the Issue

1. Install OGCS
2. Crashes with System.NullReferenceException

Any other information
OGcalsync.log

2019-06-07 06:32:46,542 INFO  1 OutlookGoogleCalendarSync.ErrorFlagAppender [0] -  Attaching to the already running Outlook process.
2019-06-07 06:32:46,542 WARN  1 OutlookGoogleCalendarSync.ErrorFlagAppender [0] -  Early binding to Outlook appears to have failed.
2019-06-07 06:32:46,543 ERROR  1 OutlookGoogleCalendarSync.ErrorFlagAppender [0] -  System.NullReferenceException: Object reference not set to an instance of an object.
2019-06-07 06:32:46,809 ERROR  1 OutlookGoogleCalendarSync.OGCSexception [0] -  Code: 0x80004003;-2147467261
2019-06-07 06:32:46,816 ERROR  1 OutlookGoogleCalendarSync.OGCSexception [0] -     at OutlookGoogleCalendarSync.OutlookOgcs.Calendar.PoorlyOfficeInstall(Exception caughtException)
2019-06-07 06:32:46,818 DEBUG  1 OutlookGoogleCalendarSync.OutlookOgcs.Calendar [0] -  Could try late binding??
2019-06-07 06:32:46,819 FAIL  1 OutlookGoogleCalendarSync.Telemetry [0] -  Failed determining Outlook client version.