Not running in a hosted service or the Development Fabric

Question

I have a problem related to the webRole debugging.

Not running in a hosted service or the Development Fabric. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Not running in a hosted service or the Development Fabric.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidOperationException: Not running in a hosted service or the Development Fabric.]
   Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitor.GetDefaultStartupInfoForCurrentRoleInstance() +169
   Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener..ctor() +57

[ConfigurationErrorsException: Could not create Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener, Microsoft.WindowsAzure.Diagnostics, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35.]
   System.Web.Security.Roles.Initialize() +2230194
   System.Web.Security.RoleManagerModule.OnLeave(Object source, EventArgs eventArgs) +68
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +148
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

This is the web.config part concerning Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener

<system.diagnostics> <trace> <listeners> <add type="Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener, Microsoft.WindowsAzure.Diagnostics, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="AzureDiagnostics"> <filter type="" /> </add> </listeners> </trace> </system.diagnostics>