R# 3.1 / VB.NET edition. Open any C# project with any XAML file and use BasicCompletion JetBrains.Util.InternalErrorException: Unkown feature id:BasicCompletion Unkown feature id:BasicCompletion ---> JetBrains.Util.InternalErrorException: Unkown feature id:BasicCompletion at JetBrains.Util.Logger.LogError(String) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 313 column 4 at JetBrains.Util.Logger.LogError(String, Object[]) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 323 column 3 at JetBrains.ReSharper.IDECore.Tips.TipsManager.FeatureIsUsed(String, String) in c:\A\work\be08dc054b0f1225\src\IDECore\src\Tips\TipsManager.cs:line 375 column 5 at JetBrains.ReSharper.IDECore.Tips.TipsManager.FeatureIsUsed(String, IDataContext) in c:\A\work\be08dc054b0f1225\src\IDECore\src\Tips\TipsManager.cs:line 361 column 5 at JetBrains.ReSharper.CodeInsight.Services.CodeCompletion.BasicCodeCompletionAction.Execute(IDataContext, DelegateExecute) in c:\A\work\be08dc054b0f1225\src\CodeInsight.Services\src\CodeCompletion\CodeCompletionAction.cs:line 67 column 7 at JetBrains.ActionManagement.ExecutableAction.Execute(IDataContext) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\ActionSystem\Action\ExecutableAction.cs:line 30 column 13 at JetBrains.ActionManagement.ActionManagerBase.ExecuteAction(IExecutableAction, IDataContext) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\ActionSystem\ActionManager\ActionManagerBase.cs:line 575 column 11 at JetBrains.ActionManagement.ActionManagerBase.ExecuteAction(IExecutableAction) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\ActionSystem\ActionManager\ActionManagerBase.cs:line 520 column 5 at JetBrains.VSAddin.ActionManagement.VSActionManager.Exec(Guid&, UInt32, UInt32, IntPtr, IntPtr) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.VSIntegration\src\ActionManagement\VSActionManager.cs:line 2840 column 11 — End of inner exception stack trace — at JetBrains.Util.Logger.LogExceptionEx(Exception, String, Boolean) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 263 column 4 at JetBrains.Util.Logger.LogError(String) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 314 column 3 at JetBrains.Util.Logger.LogError(String, Object[]) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 323 column 3 at JetBrains.ReSharper.IDECore.Tips.TipsManager.FeatureIsUsed(String, String) in c:\A\work\be08dc054b0f1225\src\IDECore\src\Tips\TipsManager.cs:line 375 column 5 at JetBrains.ReSharper.IDECore.Tips.TipsManager.FeatureIsUsed(String, IDataContext) in c:\A\work\be08dc054b0f1225\src\IDECore\src\Tips\TipsManager.cs:line 361 column 5 at JetBrains.ReSharper.CodeInsight.Services.CodeCompletion.BasicCodeCompletionAction.Execute(IDataContext, DelegateExecute) in c:\A\work\be08dc054b0f1225\src\CodeInsight.Services\src\CodeCompletion\CodeCompletionAction.cs:line 67 column 7 at JetBrains.ActionManagement.ExecutableAction.Execute(IDataContext) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\ActionSystem\Action\ExecutableAction.cs:line 30 column 13 at JetBrains.ActionManagement.ActionManagerBase.ExecuteAction(IExecutableAction, IDataContext) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\ActionSystem\ActionManager\ActionManagerBase.cs:line 575 column 11 at JetBrains.ActionManagement.ActionManagerBase.ExecuteAction(IExecutableAction) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\ActionSystem\ActionManager\ActionManagerBase.cs:line 520 column 5 at JetBrains.VSAddin.ActionManagement.VSActionManager.Exec(Guid&, UInt32, UInt32, IntPtr, IntPtr) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.VSIntegration\src\ActionManagement\VSActionManager.cs:line 2840 column 11