Can't solve "valid signing identity not found" issue

Hello,

I'm having a lot of trouble getting an app to build properly.  I'm using the Corona SDK, but I believe that my true problem lies here:

It says, "Valid signing identity not found."

I've gone through the process of uninstalling all of my Provisioning Profiles and reinstalling them numerous times but still haven't solved this issue.  Any advice would be greatly appreciated.

Cheers,

- Bret

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