在 TFS vNext 构建中，我通过 PS-Remoting 将多个 webtests 部署到一个 Windows 10 测试代理并运行所有 webtests。它不稳定，因为有时我会收到“System.Data.Entity.Core.ProviderIncompatibleException”错误（s.below）
服务器上已经安装了 Visual Studio 2015。sam 条件下的相同测试在 Windows 7 测试代理上运行良好。
原因是什么，我该如何解决？非常感谢！
<Timestamp> [5] ERROR <MyService>.GlobalExceptionHandler:29 - Internal Server Error!
System.Data.Entity.Core.ProviderIncompatibleException: The provider did not return a ProviderManifest instance. ---> System.Runtime.InteropServices.COMException: Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))
at System.Security.Policy.PEFileEvidenceFactory.GetLocationEvidence(SafePEFileHandle peFile, SecurityZone& zone, StringHandleOnStack retUrl)
at System.Security.Policy.PEFileEvidenceFactory.GenerateLocationEvidence()
at System.Security.Policy.PEFileEvidenceFactory.GenerateEvidence(Type evidenceType)
at System.Security.Policy.AssemblyEvidenceFactory.GenerateEvidence(Type evidenceType)
at System.Security.Policy.Evidence.GenerateHostEvidence(Type type, Boolean hostCanGenerate)
at System.Security.Policy.Evidence.GetHostEvidenceNoLock(Type type)
at System.Security.Policy.Evidence.GetHostEvidence(Type type, Boolean markDelayEvaluatedEvidenceUsed)
at System.Security.Policy.AppDomainEvidenceFactory.GenerateEvidence(Type evidenceType)
at System.Security.Policy.Evidence.GenerateHostEvidence(Type type, Boolean hostCanGenerate)
at System.Security.Policy.Evidence.GetHostEvidenceNoLock(Type type)
at System.Security.Policy.Evidence.RawEvidenceEnumerator.MoveNext()
at System.Security.Policy.Evidence.EvidenceEnumerator.MoveNext()
at System.Configuration.ClientConfigPaths.GetEvidenceInfo(AppDomain appDomain, String exePath, String& typeName)
at System.Configuration.ClientConfigPaths.GetTypeAndHashSuffix(AppDomain appDomain, String exePath)
at System.Configuration.ClientConfigPaths..ctor(String exePath, Boolean includeUserConfig)
at System.Configuration.ClientConfigPaths.GetPaths(String exePath, Boolean includeUserConfig)
at System.Configuration.ClientConfigurationHost.RequireCompleteInit(IInternalConfigRecord record)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Xml.XmlConfiguration.XmlReaderSection.get_ProhibitDefaultUrlResolver()
at System.Xml.Schema.Parser..ctor(SchemaType schemaType, XmlNameTable nameTable, SchemaNames schemaNames, ValidationEventHandler eventHandler)
at System.Xml.Schema.XmlSchema.Read(XmlReader reader, ValidationEventHandler validationEventHandler)
at System.Data.Entity.Core.SchemaObjectModel.Schema.SomSchemaSetHelper.AddXmlSchemaToSet(XmlSchemaSet schemaSet, XmlSchemaResource schemaResource, HashSet`1 schemasAlreadyAdded)
at System.Data.Entity.Core.SchemaObjectModel.Schema.SomSchemaSetHelper.ComputeSchemaSet(SchemaDataModelOption dataModel)
at System.Data.Entity.Core.Common.Utils.Memoizer`2.<>c__DisplayClass2.<Evaluate>b__0()
at System.Data.Entity.Core.Common.Utils.Memoizer`2.Result.GetValue()
at System.Data.Entity.Core.Common.Utils.Memoizer`2.Evaluate(TArg arg)
at System.Data.Entity.Core.SchemaObjectModel.Schema.CreateXmlReaderSettings()
at System.Data.Entity.Core.SchemaObjectModel.Schema.Parse(XmlReader sourceReader, String sourceLocation)
at System.Data.Entity.Core.SchemaObjectModel.SchemaManager.ParseAndValidate(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths, SchemaDataModelOption dataModel, AttributeValueNotification providerNotification, AttributeValueNotification providerManifestTokenNotification, ProviderManifestNeeded providerManifestNeeded, IList`1& schemaCollection)
at System.Data.Entity.Core.SchemaObjectModel.SchemaManager.ParseAndValidate(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths, SchemaDataModelOption dataModel, DbProviderManifest providerManifest, IList`1& schemaCollection)
at System.Data.Entity.Core.SchemaObjectModel.SchemaManager.LoadProviderManifest(XmlReader xmlReader, String location, Boolean checkForSystemNamespace, Schema& schema)
at System.Data.Entity.Core.Common.DbXmlEnabledProviderManifest.Load(XmlReader reader)
at System.Data.Entity.Core.Common.DbXmlEnabledProviderManifest..ctor(XmlReader reader)
at System.Data.SQLite.EF6.SQLiteProviderManifest..ctor(String manifestToken)
at System.Data.SQLite.EF6.SQLiteProviderServices.GetDbProviderManifest(String versionHint)
at System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifest(String manifestToken)
--- End of inner exception stack trace ---
at System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifest(String manifestToken)
at System.Data.Entity.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest& providerManifest)
at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
at System.Data.Entity.Internal.Linq.InternalSet`1.Create()
at System.Data.Entity.DbSet`1.Create()
at <MyService>.Persistence.EF.DeploymentRepository.CreateDeployment(String name, DeploymentStatus status)
at <MyService>.Persistence.EF.DeploymentRepository.CreateDeployment(String name)
at <MyService>.Controllers.DeploymentController.<CreateDeploymentAsync>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Threading.Tasks.TaskHelpersExtensions.<CastToObject>d__3`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.HttpServer.<SendAsync>d__0.MoveNext()