Keyboard hide not working

Hi all.
as it is in documentation, I just installed keyboard for capacitor. But when I want to use it - e.g. close the keyboard, I got the error: "Keyboard" plugin is not implemented on android.

My setup:

Ionic:

   Ionic CLI                     : 6.12.3 (/usr/local/lib/node_modules/@ionic/cli)
   Ionic Framework               : @ionic/angular 5.6.3
   @angular-devkit/build-angular : 0.1102.6
   @angular-devkit/schematics    : 11.2.6
   @angular/cli                  : 11.2.6
   @ionic/angular-toolkit        : 3.1.1

Capacitor:

   Capacitor CLI   : 3.1.2
   @capacitor/core : 3.1.2

Utility:

   cordova-res                          : 0.15.3
   native-run (update available: 1.4.1) : 1.4.0

System:

   NodeJS : v14.15.4 (/usr/local/bin/node)
   npm    : 6.14.10
   OS     : macOS Big Sur

What can be wrong?

Thanks

Here you can find a few things that can cause the “plugin not implemented”