Object reference not set to an instance of an object.

Please help me, when I start PowerBI update July 2017, it don' t run and freeze yellow start screen. The app desktop show me this information message:

Data to send to Microsoft:

Feedback Type:
Frown (Error)

Timestamp:
2017-07-10T15:26:31.1272688Z

Local Time:
2017-07-10T10:26:31.1272688-05:00

Product Version:
2.48.4792.481 (PBIDesktop) (x64)

Release:
July 2017

IE Version:
11.413.15063.0

OS Version:
Microsoft Windows NT 10.0.15063.0 (x64 en-US)

CLR Version:
4.6.2. or later [Release Number = 460798]

Peak Working Set:
262 MB

Private Memory:
200 MB

Peak Virtual Memory:
33.6 GB

Error Message:
Object reference not set to an instance of an object.

Stack Trace:
System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.PowerBI.Client.Windows.Services.PowerBIWebResponse.get_StatusCode()
at Microsoft.PowerBI.Client.Windows.PowerBIService.RetryableWebRequest.IsRetryable(PowerBIWebException webException)
at Microsoft.PowerBI.Client.Windows.PowerBIService.RetryableWebRequest.Execute()
at Microsoft.PowerBI.Client.Windows.PowerBIService.CloudConfigurationManager.SetCloud(String emailAddress)
at Microsoft.PowerBI.Client.Windows.PowerBIService.AuthenticationManager.TryGetUserIndentityInfo(UserIdentityInfo& userIdentityInfo)
at Microsoft.PowerBI.Client.Windows.PowerBIService.AuthenticationManager.EnsureSignInStatusInitialized()
at Microsoft.PowerBI.Client.Windows.PowerBIService.AuthenticationManager.get_IsSignedIn()
at Microsoft.PowerBI.Client.Windows.Ux.RibbonSignInForm.UpdateUsernameLabel()
at Microsoft.PowerBI.Client.Windows.Ux.RibbonSignInForm..ctor(IWin32Window ownerWindow, WindowsHost windowsHost, ICloudConfigurationManager cloudManager, IAuthenticationManager authenticationManager, IAuthenticationUIHandler authenticationUIHandler, IPowerBIServiceClient powerbiServiceClient, IEventAggregationService eventAggregationService, IPowerBITelemetryService powerbiTelemetryService, IExceptionHandler exceptionHandler, Boolean showLoginButton)
at Microsoft.PowerBI.Client.Windows.MainWindow..ctor(IWindowServiceFactory windowServiceFactory, IEventAggregationService eventAggregationService, IFileOperationUIHandler fileOperationUIHandler, IFileManager fileManager, IModelAuthoringRoutingService modelAuthoringRoutingService, IUIBlockingService uiBlockingService, ISchemaItemActivationService schemaItemActivationService, IViewSelectionService viewSelectionService, IUpdateNotificationManager updateNotificationManager, IPowerBIStringProvider stringProvider, IPowerBITelemetryService telemetryService, ITypeNameProvider typeNameProvider, WindowsHost windowsHost, MainWindowParameters initializationParameters, FormulaHistoryManager formulaHistoryManager, Icon dialogIcon, IReportManager reportManager, IPowerBIServiceClient powerBIServiceClient, IAuthenticationManager authenticationManager, IAuthenticationUIHandler authenticationUIHandler, ICloudConfigurationManager cloudManager, ApplicationTracingHost applicationTracingHost, IFileHistoryManager fileHistoryManager, ICefBrowserFactory cefBrowserFactory, IDiagramViewManager diagramViewManager, IPowerBISettings powerBISettings, IModelProxy modelProxy, IAnalysisServicesLoadContextFactory analysisServicesLoadContextFactory, IFileDialogManager fileDialogManager, EditorScaler editorScaler, String[] additionalDefaultOptionalModules)
at Microsoft.PowerBI.Client.Program.<>c__DisplayClassd.<Main>b__0()
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)

Invocation Stack Trace:
at Microsoft.Mashup.Host.Document.ExceptionExtensions.GetCurrentInvocationStackTrace()
at Microsoft.Mashup.Client.ClientShared.FeedbackErrorInfo..ctor(String message, Nullable`1 errorCode, String requestId, Exception exception)
at Microsoft.Mashup.Client.ClientShared.UnexpectedExceptionHandler.<>c__DisplayClass1.<HandleException>b__0()
at Microsoft.Mashup.Client.ClientShared.UnexpectedExceptionHandler.HandleException(Exception e)
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
at Microsoft.PowerBI.Client.Program.Main(String[] args)


User ID:
9bdae86f-e94e-43c9-9d2e-b417946cbb80

Session ID:
aaa5dc1a-0697-4940-a162-5d853c3f08b1

Telemetry Enabled:
True

DPI Scale:
200%

Supported Services:
Power BI