/You don't have permission to access any of the organizations in the Microsoft Dynamics CRM Online region that you specified. If you're not sure which region your organization resides in, choose /Don't know/ for the CRM region and try again. Otherwise check with your CRM administrator./
This didn't help as I can use new package deployer and can login. But I am unable to login through the Package Deployer which is present inside the Demo Data file which Microsoft gave. I also cannot use latest package deployer by copying the PkgFolder and dll, as latest package deployer does not have the methods which are required for the migration process. Can you download the demo data file from here https://learn.microsoft.com/en-us/dynamics365/project-operations/psa/install-sample-data-3-x and run the package deployer to see if you can login?
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