How to restore the native keyboard on a locked phone?

Question

Android

During the installation of the application, the custom keyboard was removed, which was installed by default, the phone turned off and now there is no way to enter the code, because. does not show any normal keyboard with buttons.
Phone without debug mode enabled, without root, with a locked bootloader.
Telephone:

• HTC Desire 816G
  
• Android v4.4.2
  

UPD: Connecting the keyboard via OTG cable did not help.