APARs listed for a specific component apply only to that component.Other APARs apply to Cognos BI Server and may also apply to other components.Failed to locate or generate matching signing assets Xcode attempted to locate or generate matching signing assets and failed to do so because of the following issues. In my case I needed to transfer the "Apple World Wide Developer Relations Certificate Authority" certificate additionally (see answer below) Thanks for bringing this to the attention of the community and apologies for the issues you’ve been having.
This issue stems from having a copy of the expired WWDR Intermediate certificate in both your System and Login keychains.
To resolve the issue, you should first download and install the new WWDR intermediate certificate (by double-clicking on the file).
Next, in the Keychain Access application, select the System keychain.
Make sure to select “Show Expired Certificates” in the View menu and then delete the expired version of the Apple Worldwide Developer Relations Certificate Authority Intermediate certificate (expired on February 14, 2016).
A comprehensive list of defect corrections for major releases, refresh packs and fix packs of Cognos Business Intelligence 10.2.1.
Details of the APARs listed below can be accessed by clicking the link for the APAR number.
If you have questions about a particular defect, please contact Customer Support.
Note: Fixes previously available in Cognos BI 10.2.1 FP1 Feature Bundle are included in Cognos BI 10.2.1 FP3.
Your certificates should now appear as valid in Keychain Access and be available to Xcode for submissions to the App Store. If it is not working: Are you sure you added the new one?