Unable to install App - Error Unknown

Hello all, since the latest xcode (12) and iOS (14) update I'm not able to install my app on a physical device. The error I get is 'Unable to install "Qvadis"' and this log:

Code Block Details
Unable to install "Qvadis"
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           0x000000011d9fe93f DTDKCreateNSErrorFromAMDErrorCode + 220
1  DTDeviceKitBase           0x000000011da3d124 90-[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:]_block_invoke + 155
2  DVTFoundation            0x000000010216fb43 DVTInvokeWithStrongOwnership + 71
3  DTDeviceKitBase           0x000000011da3ce65 -[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:] + 1440
4  IDEiOSSupportCore          0x000000011d8add28 118-[DVTiOSDevice(DVTiPhoneApplicationInstallation) processAppInstallSet:appUninstallSet:installOptions:completionBlock:]_block_invoke.292 + 3513
5  DVTFoundation            0x000000010229e2aa DVT_CALLING_CLIENT_BLOCK + 7
6  DVTFoundation            0x000000010229fecc __DVTDispatchAsync_block_invoke + 1191
7  libdispatch.dylib          0x00007fff698226c4 _dispatch_call_block_and_release + 12
8  libdispatch.dylib          0x00007fff69823658 _dispatch_client_callout + 8
9  libdispatch.dylib          0x00007fff69828c44 _dispatch_lane_serial_drain + 597
10 libdispatch.dylib          0x00007fff698295d6 _dispatch_lane_invoke + 363
11 libdispatch.dylib          0x00007fff69832c09 _dispatch_workloop_worker_thread + 596
12 libsystem_pthread.dylib       0x00007fff69a7da3d _pthread_wqthread + 290
13 libsystem_pthread.dylib       0x00007fff69a7cb77 start_wqthread + 15
);
}
--
System Information
macOS Version 10.15.6 (Build 19G2021)
Xcode 12.0.1 (17220)

I hope you can help me here,
thank you.
I found the same issue. Looks like there is a change to how Personal Teams are handled which prohibits installing on a device.
I have the same trouble with iPhone and iPad with iOS14.1 on macOS 10.15.7 / Xcode 12.0.1. It occurs after iOS update. However, Simulator is OK.

.......... iPad is not available.
Please reconnect the device.
I have this same issue are there any solutions yet?
Having the same issue here. Recently reported in Feedback Assistant, no response yet.
Same issue
Same error! Any news?

An unknown error has occurred.
Domain: com.apple.dt.MobileDeviceErrorDomain
Code: -402620415

Strange thing is that sometimes works...
Unable to install App - Error Unknown
 
 
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