Plugin Registration Tool Stops loading

The Plugin Registration tool allows me to select the organization then begins loading but error at Loading Steps with this error:

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Crm.Tools.Libraries.CrmPluginStep.RefreshFromSdkMessageProcessingStep(Guid assemblyId, SdkMessageProcessingStep step, String secureConfig)
at Microsoft.Crm.Tools.Libraries.OrganizationHelper.LoadSteps(CrmOrganization org, Dictionary`2 typeList, Dictionary`2& crmStepList)
at Microsoft.Crm.Tools.PluginRegistration.Helper.<>c__DisplayClass4_0.b__0(Object o, DoWorkEventArgs e)

I have tried just about everything I found on the internet from changing http to https back and forth on the deployment manager I have update access to “C:Program FilesDynamics 365Serverbinassembly”
and set Security permission for local group “Users” as “Read and executes”.  I have tried just about every configuration, I have tried from the app server, the db server, the jump server, my desktop VPNed into the network and no VPN.  Each time I have made sure I could reach the organization service.  This started as an intermittent issue but has become a roadblock.  I have the latest version of the tool.  The log files and event viwer on the app server the db server and my desktop are of no help.  Turning on tracing for the dynamics server has been no help.  I am hoping someone out there is familiar with the code or this issue.