Property is private and only accessible within class error during production build

[kamil-szprych]

Angular 8
When i try to build project for production i get errors:
Property 'onKeyboardInput' is private and only accessible within class 'NgxImageGalleryComponent'.
The same error goes for 'onWindowResize'.

I can't remove NgxImageGalleryComponent because i need to use it in ViewChild to open gallery.

[VladimirValov]

@kamil-szprych try to use version 1.3.1

[305088020]

[305088020]

the vision 1.3.1 is the same question, How can I resolve it