Microsoft.Graph.ServiceException
  HResult=0x80131500
  Message=Code: UnknownError
Message: {"Message":"The request is invalid.","ModelState":{"request.timeConstraint.timeSlots[0].end.DateTime":["Error setting value to 'DateTime' on 'Microsoft.O365.Rest.Data.Beta.DateTimeTimeZone'."],"request.timeConstraint.timeSlots[0].start.DateTime":["Error setting value to 'DateTime' on 'Microsoft.O365.Rest.Data.Beta.DateTimeTimeZone'."]}}
Inner error:
	AdditionalData:
	date: 2023-01-07T21:21:30
	request-id: 91142046-5cf7-4857-977e-5909db8c01a7
	client-request-id: 91142046-5cf7-4857-977e-5909db8c01a7
ClientRequestId: 91142046-5cf7-4857-977e-5909db8c01a7

  Source=Microsoft.Graph.Core
  StackTrace:
   at Microsoft.Graph.HttpProvider.<SendAsync>d__18.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Graph.BaseRequest.<SendRequestAsync>d__40.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Graph.BaseRequest.<SendAsync>d__34`1.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()

  This exception was originally thrown at this call stack:
    Microsoft.Graph.HttpProvider.SendAsync(System.Net.Http.HttpRequestMessage, System.Net.Http.HttpCompletionOption, System.Threading.CancellationToken)
    Microsoft.Graph.BaseRequest.SendRequestAsync(object, System.Threading.CancellationToken, System.Net.Http.HttpCompletionOption)
    Microsoft.Graph.BaseRequest.SendAsync<T>(object, System.Threading.CancellationToken, System.Net.Http.HttpCompletionOption)