I am assuming this error is related to the sync problem that Microsoft created on 3/8/23. The content of the error is below. Any help is appreciated if this is an unrelated event.
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CalendarApp.ProviderBase.Exceptions.AccountRequestException: The specified object was not found in the store. (ErrorItemNotFound) ---> CalendarApp.Common.Net.HttpException: Not found (404).
Response status code does not indicate success: 404 (Not Found). ---> System.Exception: Not found (404).
Response status code does not indicate success: 404 (Not Found). at System.Runtime.InteropServices.McgMarshal.ThrowOnExternalCallFailed(Int32, RuntimeTypeHandle) + 0x21 at __Interop.ComCallHelpers.Call(__ComObject, RuntimeTypeHandle, Int32, Void*) + 0xbe at __Interop.ForwardComStubs.Stub_2[TThis, TResult](__ComObject, Int32) + 0x37 at Windows.Web.Http.HttpResponseMessage.EnsureSuccessStatusCode() + 0x18 at CalendarApp.Common.Net.CalendarHttpClient.d__29.MoveNext() +