The process has no package identity.

[nuriyevn]

Error while running the DigitalSigning app:

onecore\base\appmodel\runtime\winrt\lib\windows.applicationmodel.packagefactory.cpp(36)\Windows.ApplicationModel.dll!5ADF8FC0: (caller: 00EAC232) LogHr(1) tid(809c) 80073D54 The process has no package identity.
Exception thrown at 0x73C918A2 (KernelBase.dll) in DigitalSigning.exe: WinRT originate error - 0x80073D54 : 'The process has no package identity.'.
'DigitalSigning.exe' (Win32): Loaded 'C:\Windows\SysWOW64\bcrypt.dll'. Symbols loaded.
Exception thrown at 0x73C918A2 in DigitalSigning.exe: Microsoft C++ exception: Platform::COMException ^ at memory location 0x008BDDAC.

[nuriyevn]

The problem was with the way I use the application. It needs to be started as App from the start menu, as installed app not from the debugger.