Unable to Login to Dynamics CRMOrganizationServiceProxy is null

I get this error when I try to connect to my onPremise environment v9.1. Here is how I connect:


`.\spkl.exe plugins spkl.json "AuthType=AD;url=https://my-server/myOrg/;Domain=my-domain;Username=admin_user;Password=xxxxxxxxxxxxxxxxxxxxxx"`

The error:

**Unable to Login to Dynamics CRMOrganizationServiceProxy is null**