System.ArgumentNullException in AllPdfsGenerated

[elsand]

Several instances have hit a NRE in staging:

ie:
{"appId":"brg/virksomhetsregistrering","partyId":"51365666","instanceId":"f7873cfd-e0eb-4354-8411-c6f933ae5af0","instanceCreatedAt":"2026-06-12T14:08:27.918617Z","isMigration":false,"eventType":2}

Link to Application Insights

Exception:
System.ArgumentNullException

Stack trace:
System.ArgumentNullException:
at System.Linq.ThrowHelper.ThrowArgumentNullException (System.Linq, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a)
at System.Linq.Enumerable.Any (System.Linq, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a)
at Altinn.DialogportenAdapter.WebApi.Features.Command.Sync.StorageDialogportenDataMerger+<>c__DisplayClass15_0.b__5 (Altinn.DialogportenAdapter.WebApi, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: /app/src/Altinn.DialogportenAdapter.WebApi/Features/Command/Sync/StorageDialogportenDataMerger.cs:476)
at System.Linq.Enumerable.Count (System.Linq, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a)
at Altinn.DialogportenAdapter.WebApi.Features.Command.Sync.StorageDialogportenDataMerger.AllPdfsGenerated (Altinn.DialogportenAdapter.WebApi, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: /app/src/Altinn.DialogportenAdapter.WebApi/Features/Command/Sync/StorageDialogportenDataMerger.cs:474)
at Altinn.DialogportenAdapter.WebApi.Features.Command.Sync.StorageDialogportenDataMerger.GetAttachmentAndTransmissions (Altinn.DialogportenAdapter.WebApi, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: /app/src/Altinn.DialogportenAdapter.WebApi/Features/Command/Sync/StorageDialogportenDataMerger.cs:288)
at Altinn.DialogportenAdapter.WebApi.Features.Command.Sync.StorageDialogportenDataMerger+d__12.MoveNext (Altinn.DialogportenAdapter.WebApi, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: /app/src/Altinn.DialogportenAdapter.WebApi/Features/Command/Sync/StorageDialogportenDataMerger.cs:180)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Altinn.DialogportenAdapter.WebApi.Features.Command.Sync.StorageDialogportenDataMerger+<Merge>d__11.MoveNext (Altinn.DialogportenAdapter.WebApi, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: /app/src/Altinn.DialogportenAdapter.WebApi/Features/Command/Sync/StorageDialogportenDataMerger.cs:49) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Altinn.DialogportenAdapter.WebApi.Features.Command.Sync.SyncInstanceToDialogService+d__6.MoveNext (Altinn.DialogportenAdapter.WebApi, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: /app/src/Altinn.DialogportenAdapter.WebApi/Features/Command/Sync/ISyncInstanceToDialogService.cs:189)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Internal.Generated.WolverineHandlers.SyncInstanceCommandHandler1196732115+d__2.MoveNext (pcsehvlg.pzz, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Internal.Generated.WolverineHandlers.SyncInstanceCommandHandler1196732115+d__2.MoveNext (pcsehvlg.pzz, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Wolverine.Runtime.Handlers.Executor+d__24.MoveNext (Wolverine, Version=5.39.3.0, Culture=neutral, PublicKeyToken=null: /home/runner/work/wolverine/wolverine/src/Wolverine/Runtime/Handlers/Executor.cs:204)