I have the same kind of error. It's the same as the one of c4stus above: Unable to install "Concentration" Domain: com.apple.dt.MobileDeviceErrorDomain Code: -402620415- An unknown error has occurred. Domain: com.apple.dt.MobileDeviceErrorDomain Code: -402620415 User Info: { 		DVTRadarComponentKey = 280331; 		MobileDeviceErrorCode = "(0xE8008001)"; 		"com.apple.dtdevicekit.stacktrace" = ( 0	 DTDeviceKitBase										 0x000000011eca981a DTDKCreateNSErrorFromAMDErrorCode + 233 1	 DTDeviceKitBase										 0x000000011eceaf70 __90-[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:]_block_invoke + 155 2	 DVTFoundation											 0x00000001069e0155 DVTInvokeWithStrongOwnership + 73 3	 DTDeviceKitBase										 0x000000011eceaca8 -[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:] + 1654 4	 IDEiOSSupportCore									 0x000000011eb61e91 __118-[DVTiOSDevice(DVTiPhoneApplicationInstallation) processAppInstallSet:appUninstallSet:installOptions:completionBlock:]_block_invoke.352 + 4165 5	 DVTFoundation											 0x0000000106b137f4 DVT_CALLING_CLIENT_BLOCK + 7 6	 DVTFoundation											 0x0000000106b15436 __DVTDispatchAsync_block_invoke + 1194 7	 libdispatch.dylib									 0x00007fff730826c4 _dispatch_call_block_and_release + 12 8	 libdispatch.dylib									 0x00007fff73083658 _dispatch_client_callout + 8 9	 libdispatch.dylib									 0x00007fff73088c44 _dispatch_lane_serial_drain + 597 10	libdispatch.dylib									 0x00007fff730895d6 _dispatch_lane_invoke + 363 11	libdispatch.dylib									 0x00007fff73092c09 _dispatch_workloop_worker_thread + 596 12	libsystem_pthread.dylib						 0x00007fff732dda3d _pthread_wqthread + 290 13	libsystem_pthread.dylib						 0x00007fff732dcb77 start_wqthread + 15 ); }- System Information macOS Version 10.15.5 (Build 19F101) Xcode 11.5 (16139)

At first I thought some hardware issue, maybe reboot will fix it. It didn't. Googled and saw this page. And, yes, I recently upgraded to 15.1 too.