Cannot set Subscription settings for QMM collection destined to Office 365 (4259627)

When trying to set Subscription settings for mailbox collection the following error appears on the screen:

Unhandled exception  has occurred in a component in your application. If youc click Continue, the application will ignore this error and attempt to continue.

Object reference not set to an instance of an object.

EMWMigration.log file also shows the following error:

9/17/2014 4:30:55 AM:382 O365ProvisioningWebService|Quest.MigrationManager.Exchange.O365ProvisioningWebService.O365Provisioning.ListSku Error: Exception:

System.NullReferenceException: Object reference not set to an instance of an object.
   at Quest.MigrationManager.Exchange.O365ProvisioningWebService.O365Provisioning.ListSku()
   at Quest.MigrationManager.Exchange.View.O365SelectSubscriptionPage.Prepare(Boolean bFirst, InParameters inParams, IO365SelectSubscriptionControl control)
 on
   at Quest.MigrationManager.Exchange.O365ProvisioningWebService.O365Provisioning.ListSku()
   at Quest.MigrationManager.Exchange.View.O365SelectSubscriptionPage.Prepare(Boolean bFirst, InParameters inParams, IO365SelectSubscriptionControl control)
9/17/2014 4:30:55 AM:382 MMExViewCore|Quest.MigrationManager.Exchange.View.O365SelectSubscriptionPage.Prepare Error: Cannot retrieve subscription data from Microsoft Office 365. Details: Object reference not set to an instance of an object.
9/17/2014 4:33:19 AM:237 MMExControls|Quest.MigrationManager.Exchange.View.Controls.O365SelectSubscriptionControl.CurrentSku Error: Exception:

System.NullReferenceException: Object reference not set to an instance of an object.
   at Quest.MigrationManager.Exchange.View.Controls.O365SelectSubscriptionControl.CurrentSku()
   at Quest.MigrationManager.Exchange.View.Controls.O365SelectSubscriptionControl.get_selectedSubscription()
   at Quest.MigrationManager.Exchange.View.O365SelectSubscriptionPage.CheckCriticalParameters(IO365SelectSubscriptionControl control)
   at Quest.MigrationManager.Exchange.View.PageBase`3.Quest.MigrationManager.Exchange.View.IPage.CheckCriticalParameters(Boolean bLeaveNode)
   at Quest.MigrationManager.Exchange.View.Properties.PropertiesBase.IsCurrentPageCorrect()
   at Quest.MigrationManager.Exchange.View.Properties.PropertiesBase.<>c__DisplayClass4.<_form_BeforeNodeClick>b__3()
   at Quest.MigrationManager.Exchange.View.Properties.PropertiesBase.FormActionsHandler(FormActionHandlerDelagate handler)
 on
   at Quest.MigrationManager.Exchange.View.Controls.O365SelectSubscriptionControl.CurrentSku()
   at Quest.MigrationManager.Exchange.View.Controls.O365SelectSubscriptionControl.get_selectedSubscription()
   at Quest.MigrationManager.Exchange.View.O365SelectSubscriptionPage.CheckCriticalParameters(IO365SelectSubscriptionControl control)
   at Quest.MigrationManager.Exchange.View.PageBase`3.Quest.MigrationManager.Exchange.View.IPage.CheckCriticalParameters(Boolean bLeaveNode)
   at Quest.MigrationManager.Exchange.View.Properties.PropertiesBase.IsCurrentPageCorrect()
   at Quest.MigrationManager.Exchange.View.Properties.PropertiesBase.<>c__DisplayClass4.<_form_BeforeNodeClick>b__3()
   at Quest.MigrationManager.Exchange.View.Properties.PropertiesBase.FormActionsHandler(FormActionHandlerDelagate handler)