2. Make sure that your application description file has been uploaded to the Apple developer account and approved.
3. Make sure that your application profile is configured correctly in Xcode.
4. Recompile your application in Xcode and make sure that the description file is signed.
5. If the description file is still unsigned, please use Xcode's Clean function to clean up the project and recompile the application to ensure that the description file is signed.