Outlook ResponseStatus inaccessible - "Something went wrong. You may want to try again"

[DamianEdwards]

OGCS Version: v2.8.3-alpha
Edition: Installed
Sync Direction: O->G

Bug Description
Sync starting failing 10 days ago (March 18th, 2020) with error "Value cannot be null. Parameter name: source". After updating to 2.8.3-alpha the specific error message is no longer displayed in the UI but you can see it in the log. Screen shot:

Steps to Reproduce the Issue
It happens on any sync attempt. I tried changing back to manual sync (from push sync) and it still fails the same way.

Any other information
📎 OGcalsync.log file is at https://gist.github.com/DamianEdwards/5383cd9d33c028f76536007910eed2b6

[phw198]

Excerpt from your log:

2020-03-28 17:47:05,640 ERROR  28 OutlookGoogleCalendarSync.OGCSexception [0] -  System.Runtime.InteropServices.COMException: Sorry, something went wrong. You may want to try again.
2020-03-28 17:47:05,642 ERROR  28 OutlookGoogleCalendarSync.OGCSexception [0] -  Code: 0xAC570057;-1403584425
2020-03-28 17:47:05,642 ERROR  28 OutlookGoogleCalendarSync.OGCSexception [0] -     at Microsoft.Office.Interop.Outlook._AppointmentItem.get_ResponseStatus()
   at OutlookGoogleCalendarSync.OutlookOgcs.Calendar.FilterCalendarEntries(Items OutlookItems, Boolean filterBySettings, Boolean noDateFilter, String extraFilter, Boolean suppressAdvisories)
   at OutlookGoogleCalendarSync.OutlookOgcs.Calendar.GetCalendarEntriesInRange(Boolean suppressAdvisories)
   at OutlookGoogleCalendarSync.Sync.Engine.synchronize()
   at OutlookGoogleCalendarSync.Sync.Engine.<>c__DisplayClass20_0.<Start>b__0(Object o, DoWorkEventArgs args)

So it seems you have the filter set to only sync invites that you have responded to, but for at least one item, this attribute cannot be accessed.

📦 This hotfix v2.8.3.10.zip (see instructions for applying) should now skip filtering any such appointments and continue.

Please let me know how it goes.

[phw198]

@DamianEdwards Any feedback on the fix?