Check your permissions in the “Manage Permissions” button. Your user name should be in the admin role in order to add sources. And then once you add sources, you should be a user for that source in order to see the vocab version in the Config page and actually use it.
@Ajit_Londhe Thank you for your response. My profile is part of the admin and all the check box under permission where check and continue getting the message mention above.
What sources you are pertaining? and how can we add sources?
Is this different from what inside the permission tab?