error during EmbededImagesRepairEnricher: Fixing HTML field attachments

[MarcoBelliAvvale]

Hi with MigrationTools-16.3.3 I have this error

[07:47:49 ERR] [16.3.3] Field map fault
System.ArgumentNullException: Value cannot be null.
Parameter name: name
at Microsoft.TeamFoundation.WorkItemTracking.Client.FieldDefinitionCollection.Contains(String name)
at Microsoft.TeamFoundation.WorkItemTracking.Client.FieldCollection.Contains(String fieldName)
at MigrationTools.FieldMaps.AzureDevops.ObjectModel.FieldToFieldMap.IsValid(WorkItem source, WorkItem target) in D:\a\azure-devops-migration-tools\azure-devops-migration-tools\src\MigrationTools.Clients.TfsObjectModel\Tools\FieldMappingTool\FieldMaps\FieldToFieldMap.cs:line 83
at MigrationTools.FieldMaps.AzureDevops.ObjectModel.FieldToFieldMap.InternalExecute(WorkItem source, WorkItem target) in D:\a\azure-devops-migration-tools\azure-devops-migration-tools\src\MigrationTools.Clients.TfsObjectModel\Tools\FieldMappingTool\FieldMaps\FieldToFieldMap.cs:line 39
at MigrationTools.FieldMaps.AzureDevops.ObjectModel.FieldMapBase.Execute(WorkItemData source, WorkItemData target) in D:\a\azure-devops-migration-tools\azure-devops-migration-tools\src\MigrationTools.Clients.TfsObjectModel\Tools\FieldMappingTool\FieldMaps\FieldMapBase.cs:line 39