I've just enrolled in Apple's iOS Developer Program (account type: Individual).
In my Xcode organizer on my iPhone 4 device I click "Add device to provisioning portal" => Xcode asks my credentials => I enter them => I see "No value was provided for the parameter 'appIdName'." dialog window.
What am I missing?
Part of the process in Xcode's automated submitting of certificate requests is that it looks for a "Wildcard" app ID. If you're missing this (for some reason, it's created on some accounts automatically and not created automatically on others?), this automated process will likely fail.
To fix it, try the following:
1) "Revoke" any existing certificates you might have from within the developer portal
2) Create a new "App Id"; title it "Wildcard"; and enter only " * " (without any spaces or quotes) as the suffix.
3) Try the automated certificate request from within Xcode again, and it should now work
Cheers!