LogPlayLevel: IPhonePackager: … Processing one mach object (binary is thin)
LogPlayLevel: IPhonePackager: … Initial signature step (0.41 s elapsed so far)
LogPlayLevel: IPhonePackager: IPP ERROR: Application exception: System.Security.Cryptography.CryptographicException: Keyset does not exist
So the “Keyset does not exist” error seems to imply you don’t have the security permissions to sign with the certificate that we determined was the best match. Can you verify that you have the permissions on your PC for that certificate? You can run certmgr from a Command prompt to access the certificate manager on your PC.
-Pete