This is the error message that has been plaguing me for a few days.
What triggered it was replacing my provisioning profiles and certificates.
Fortunately I found an answer in the following blog post
CodeSign error: a valid provisioning profile is required

I was struggling for some hours on an issue with an App I’m writing for the iPhone.
For some reason I could not get any of the views to rotate to landscape, the API docs suggested that this was trivial and only required implementing the method
(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
and always returning YES
The problem is that this doesn’t work if [...]