there is no directive with exportas set to matautocomplete code example

Example: No directive found with exportAs 'matAutocomplete'

import { MatAutocompleteModule, MatFormFieldModule } from '@angular/material';

@NgModule({
    imports: [
        ....
        MatAutocompleteModule, 
        MatFormFieldModule,
        ....
    ],
    ....
})
export class AppModule { }