Error during login after Import Organization

I am using Microsoft Dynamics CRM 2015 rollup 2, and Importing Organization through wizard in MSCRM Deployment Manager.
I can succesfully import from original organization to a new one (orgOrganization --> Organization2) and able to login and access.

If I import again from organization2 to anther one (Organization2 --> Organization3), the import progress was success with no errors,
but then when I try to login to MSCRM to go the new organization just created (Organization3)
It shows the following error on the page:
An error has occurred.

Try this action again. If the problem continues, check the Microsoft Dynamics CRM Community for solutions or contact your organization's Microsoft Dynamics CRM Administrator. Finally, you can contact Microsoft Support.

Appreicate if someone could advise what I missed here.

Thanks in advance

AW