hello everyone, i solved the problem by adding iOS 14.5 the device support file inside the Xcode app in path contents/Developer/platform/iPhoneOS.platform/DeviceSupport You can download it from GitHub - https://github.com/iGhibli/iOS-DeviceSupport/tree/master/DeviceSupport or you can download the new beta version and grab the directory from it.

Thank you for the answer. There is no error, the only problem is that Xcode not recognize my device that use the new beta version iOS 14.5 I know the solution (install new Xcode beta version on Big Sur), but I cannot install Xcode beta because I've got a MacBook Air 2012 not compatible with Big Sur. My phone works properly, I installed the beta version because I need to test my app on it. Do you know if there is other solution?