Cannot read property 'children' of null

Hello,

Do you have any relevant error messages in the DPS logs? Here is the online help page to raise the debug level and consult the DPS logs.
https://helpserver.devolutions.net/configure_dvlslogs.html

Best regards,

This is logged when trying to access



NullReferenceException - Object reference not set to an instance of an object.

at Devolutions.Server.SecurityRoleManager.GetDefaultValue(CustomSecurity currentUserCustomSecurity, SecurityRoleDataSourceRight right)
at Devolutions.Server.SecurityRoleManager.<>c.c09116c97f7b02f107a10b486dbb15320(DataSourcePermission ca1ab0ecf00a40a68ad7eb9c305ef0ce4)
at Devolutions.Utils.ExtensionUtils.ForEach[T](IEnumerable`1 list, Action`1 act)
at Devolutions.Server.SecurityRoleManager.GetDefaultDataSourcePermissions(DataSourcePermission[] permissions)
at Devolutions.Server.PartialConnection.SetRootPermissions(DataSourcePermission[] dataSourcePermissions)
at Devolutions.Server.PartialConnection..ctor(ConnectionInfoEntity connectionInfoEntity)
at Devolutions.RemoteDesktopManager.Server.Managers.PartialConnectionManager.CreatePartialConnectionNoData(SessionContext context, Guid repositoryId, ConnectionInfoEntity connectionInfoEntity, Boolean isPrivate)
at Devolutions.Server.ConnectionNavigationManager.GetConnectionsTree(SessionContext context, Guid repositoryId)
at Devolutions.Server.Controllers.APIControllers.V2.BackendApiController.GetPartialConnectionTree(String id)
at lambda_method(Closure , Object , Object[] )
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass6_2.<GetExecutor>b__2(Object instance, Object[] methodParameters)
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__6.MoveNext()

Hello,

Could you please try to reset the DPS cache in Administration - Reset Server Cache? Please reset everything except Domain and Office365.
https://helpserver.devolutions.net/webinterface_resetcache.html

Best regards,

Did this now but it didn´t help.

Same problem

Hello,

Thank you for your feedback.

Could you please send me the DPS diagnostic report using the Send Diagnostic to Support from the Advanced menu of the DPS Console? Please add a reference of this forum topic in the object of the diagnostic report dialog.

As this report will create a ticket in our system, I will also send you a link to our online reservation system to book a remote session for further investigation.

Best regards,

Hello,

@everyone, the issue was a corrupted root record of the Default vault in the database. The issue is now solved.

Best regards,

I have exact the same Issue.

How can i fix the root-record?

I am familiar with SSMS and i have a test environment.

Hello,

@kritzinger Could you please send an email to ticket@devolutions.net and we will provide the information to solve this error.

Best regards,

done. waiting for response :)