Can't bind to config

[janniemeyer]

I am getting some errors on trying to use ngxGridsterItemPrototype directive in Angular 12:

Can't bind to 'config' since it isn't a known property of 'div'.

Can't bind to 'w' since it isn't a known property of 'div'.

Can't bind to 'h' since it isn't a known property of 'div'.

It looks like the directive is not registered properly as it is looking for properties of the div element, not the directive.
I have added everything that is mentioned on the readme page to my app.module.ts.
Is there anything I would have to do in addition to make the ngxGridsterItemPrototype directive work?