Calendar Synch Error

I am receiving the following errors with Windows 10 and Icloud Calendar.
3:05:37 PM jeff@thetuckers.us [CalDAV]  Synchronizing items: Sync of item /1009944164/calendars/inbox/79e4c238d67fb46dfbccd3eec771c6554cb9de73.ics failed due to the following error: One of the identified items was in an invalid format.
3:05:37 PM jeff@thetuckers.us [CalDAV]  Synchronizing items: Sync of item /1009944164/calendars/inbox/c08dc25deea858d659cd402a255943bf4a5a366d.ics failed due to the following error: One of the identified items was in an invalid format.
3:05:37 PM jeff@thetuckers.us [CalDAV]  Synchronizing items: Sync of item /1009944164/calendars/inbox/c23209cf368a24db4bf3b7196deb17a578c308c5.ics failed due to the following error: One of the identified items was in an invalid format.
3:05:37 PM jeff@thetuckers.us [CalDAV]  Synchronizing items: Sync of item /1009944164/calendars/inbox/cde6b8e6e4668019089a3a980be67fe3ed99f1b5.ics failed due to the following error: One of the identified items was in an invalid format.
3:05:37 PM jeff@thetuckers.us [CalDAV]  Synchronizing items: Sync of jeff@thetuckers.us/ finished: 0 uploaded, 0 deleted, 0 obsolete, 49 items,  4 downloaded
3:05:37 PM jeff@thetuckers.us [CalDAV]  Synchronizing items: Done