資格確認できません？
Version:20230405版
System.NullReferenceException: オブジェクト参照がオブジェクト インスタンスに設定されていません。
場所 RPPMAN.Models.資格確認.ResultOfQualificationConfirmation.Load(XElement x, DateTime 資格確認日)
場所 RPPMAN.Models.資格確認.MessageBody.<>c__DisplayClass16_0.<Load>b__0(XElement x)
場所 System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
場所 System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
場所 System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
場所 RPPMAN.Models.資格確認.MessageBody.Load(XElement xElement, DateTime 資格確認日)
場所 RPPMAN.Models.資格確認.資格確認Response.Load(XElement doc)
場所 RPPMAN.Models.資格確認.資格確認Response.LoadResult(String uri)
場所 RPPMAN.Models.資格確認.資格確認Response.Load(String uri)
場所 RPPMAN.Models.資格確認.資格確認Response.<ReadFolderImpl>d__20.MoveNext()
場所 System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
場所 System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
場所 RPPMAN.Views.Screens.受付一覧画面.Read連携資格確認Result()
場所 RPPMAN.Views.Screens.受付一覧画面.fileSystemWatcherResponse_Created(Object sender, FileSystemEventArgs e)

mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
RPPMAN, Version=2.99.8495.29922, Culture=neutral, PublicKeyToken=null
System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
PresentationCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Xaml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
SimpleInjector, Version=4.10.2.0, Culture=neutral, PublicKeyToken=984cb50dea722e99
Microsoft.Toolkit.Mvvm, Version=7.1.0.0, Culture=neutral, PublicKeyToken=4aff67a105548ee2
netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51
RPPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
System.Runtime.InteropServices.RuntimeInformation, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
mscorlib.resources, Version=4.0.0.0, Culture=ja, PublicKeyToken=b77a5c561934e089
Anonymously Hosted DynamicMethods Assembly, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
PresentationFramework.Aero2, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Accessibility, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51
System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51
PresentationFramework-SystemXml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
PresentationCore.resources, Version=4.0.0.0, Culture=ja, PublicKeyToken=31bf3856ad364e35
UIAutomationTypes, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
UIAutomationProvider, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Deployment, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Deployment.resources, Version=4.0.0.0, Culture=ja, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.VisualBasic, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Data.resources, Version=4.0.0.0, Culture=ja, PublicKeyToken=b77a5c561934e089
System.Transactions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.EnterpriseServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Numerics, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Microsoft.Xaml.Behaviors, Version=1.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Data.DataSetExtensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Windows.Forms.resources, Version=4.0.0.0, Culture=ja, PublicKeyToken=b77a5c561934e089
WindowsFormsIntegration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
RPPMAN薬袋, Version=2.6.8495.29916, Culture=neutral, PublicKeyToken=null
Microsoft.GeneratedCode, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
Microsoft.GeneratedCode, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
PresentationFramework.resources, Version=4.0.0.0, Culture=ja, PublicKeyToken=31bf3856ad364e35
PresentationFramework-SystemData, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
PresentationFramework-SystemCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Xml.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
PresentationFramework-SystemXmlLinq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089