费用报销流程审批时提交报错

费用报销流程审批时提交报错，提示日期错误，帮忙看下什么原因，感谢!

[{"operation":"WF_BillAssignApproval.MBIClick.tbWFSubmit"}]
在 System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
在 Kingdee.K3.FIN.ER.App.ServicePlugIn.BillConvert.ExpReimbToAROtherRecConvert.AfterConvert(AfterConvertEventArgs e)
在 Kingdee.BOS.Core.Metadata.ConvertElement.PlugIn.ConvertPlugInProxy.FireAfterConvert(AfterConvertEventArgs e)
在 Kingdee.BOS.App.Core.Convertible.DefaultPolicyPush.GetPushResultAction.Do()
在 Kingdee.BOS.Core.BusinessPolicyModel.BusinessPolicyEngine.Do(OperateOption context)
在 Kingdee.BOS.App.Core.Convertible.ConvertEngine.OnCreating(PushArgs pushArgs, OperateOption option)
在 Kingdee.BOS.App.Core.ConvertService.Push(Context ctx, PushArgs serviceArgs, OperateOption option, Boolean validPermission)
在 Kingdee.K3.FIN.ER.App.Core.AbstractAutoPushService.PushAndSaveTargetBill(ConvertOp
调用堆栈：
在 System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
在 Kingdee.K3.FIN.ER.App.ServicePlugIn.BillConvert.ExpReimbToAROtherRecConvert.AfterConvert(AfterConvertEventArgs e)
在 Kingdee.BOS.Core.Metadata.ConvertElement.PlugIn.ConvertPlugInProxy.FireAfterConvert(AfterConvertEventArgs e)
在 Kingdee.BOS.App.Core.Convertible.DefaultPolicyPush.GetPushResultAction.Do()
在 Kingdee.BOS.Core.BusinessPolicyModel.BusinessPolicyEngine.Do(OperateOption context)
在 Kingdee.BOS.App.Core.Convertible.ConvertEngine.OnCreating(PushArgs pushArgs, OperateOption option)
在 Kingdee.BOS.App.Core.ConvertService.Push(Context ctx, PushArgs serviceArgs, OperateOption option, Boolean validPermission)
在 Kingdee.K3.FIN.ER.App.Core.AbstractAutoPushService.PushAndSaveTargetBill(ConvertOperationResult operationResult)
在 Kingdee.BOS.App.Core.PlugInProxy.OperationServicePlugInProxy.FireEndOperationTransaction(EndOperationTransactionArgs e)
在 Kingdee.BOS.App.Core.AbstractOprerationService.CallOperation(DynamicObject[]& objs)
在 Kingdee.BOS.App.Core.AbstractOprerationService.CallOperatinTransaction(DynamicObject[] objs)
在 Kingdee.BOS.App.Core.AbstractOprerationService.DoExcete()
在 Kingdee.BOS.App.Core.AbstractOprerationService.Excute(Object[] ids)
在 Kingdee.BOS.App.Core.SetStatusService.SetBillStatus(Context ctx, BusinessInfo businessInfo, List`1 pkEntryIds, List`1 paras, String operationNumber, OperateOption option)
在 Kingdee.BOS.Workflow.App.Core.AuditInvokeService.Execute(Context ctx, BusinessInfo info, DynamicObject[] dataEntities, String operationNumber, OperateOption option)
在 Kingdee.BOS.Workflow.App.Core.WFInvokeOperationService.InvokeService(Context ctx, String operationName, BusinessInfo info, DynamicObject[] dataEntities, OperateOption option, Boolean needNewTrans)
在 Kingdee.BOS.Workflow.App.Core.AssignmentService.InvokeAssignAndOperate(Context ctx, AssignmentRepository rep, OperateOption option, Field billNoField, List`1 lstOnlyCompletedContext, Dictionary`2 dctCompletedWithOperate, List`1 lstUnCompletedContext, LocaleValue resultName, Int32& successCount, BatchApprovalItems& batchApprovalItems)
在 Kingdee.BOS.Workflow.App.Core.AssignmentService.SubmitApprovalItems(Context ctx, AssignmentContext assignContext)
在 Kingdee.BOS.Workflow.App.Core.AssignmentService.SubmitApprovalItem(Context ctx, AssignmentContext assignContext)
在 Kingdee.BOS.Workflow.ServiceHelper.AssignmentServiceHelper.SubmitApprovalItem(Context ctx, AssignmentContext assignContext)
在 Kingdee.BOS.Workflow.PlugIns.AssignmentApproval.SubmitAssignment(Nullable`1 postId, OperateOption option)
在 Kingdee.BOS.Workflow.PlugIns.AssignApprovalBaseEdit.Submit(OperateOption option)
在 Kingdee.BOS.Workflow.PlugIns.AssignmentApproval.BarItemClick(BarItemClickEventArgs e)
在 Kingdee.BOS.Core.DynamicForm.PlugIn.DynamicFormViewPlugInProxy.FireBarItemClick(BarItemClickEventArgs e)
在 Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.BarItemClick(String parentKey, String barItemKey, BarDataManager bar, Int32 bartype)
在 Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.MainBarItemClick(String barItemKey)
在 Kingdee.BOS.Web.DynamicForm.DynamicWebFormController.MainBarItemClick(String itemKey, JSONArray postDatas)
错误数据： System.Collections.ListDictionaryInternal