Object reference not set to an instance of an object error when trying to Check in or deploy a GPO. (4373491)

Object reference not set to an instance of an object error when trying to Check in or deploy a GPO.

When trying to check out a policy and then to check it back in the following error is seen:

Object reference not set to an instance of an object.

GPO cannot check in the policy, undo checkout, and cannot deploy the policy.

The working copy is created, but even if you try to view a report of the working copy the following error is observed:

System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Object reference not set to an instance of an object. (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
System.NullReferenceException: Object reference not set to an instance of an object.
at Quest.Avalanche.VersionControl.Implementation.PolicyWorkingCopy.get_GpmDomain()
at Quest.Avalanche.VersionControl.Implementation.PolicyWorkingCopy.get_GpmGpo()
at Quest.Avalanche.ClassLibrary.LiveEnvironment.PolicyBase.GetHtmlSettingsReport(Boolean isCloaked)
at Quest.Avalanche.VersionControl.Workflow.VersionControlled.GetSettingsReport(ControlledObjectInstanceType reportType, Boolean gpoHtmlReport)