Angular Aria Autocomplete Feature - Compilation Error

I am working with a .NET + Angular WebApp Project

I added Angular Aria to the Angular project hoping to use their Autocomplete feature for a Select Box.

I copied the code directly from the first example on the angular page. https://angular.dev/guide/aria/autocomplete

However, trying to use this code is yielding Typescript error messages on compilation.

TS2551: Property '@ɵINPUT_SIGNAL_BRAND_WRITE_TYPE@1584' does not exist on type 'InputSignal<"auto-select" | "manual" | "highlight">'. Did you mean '@ɵINPUT_SIGNAL_BRAND_WRITE_TYPE@3762'? [plugin angular-compiler]
​

src/app/autocomplete/autocomplete.component.html:1:16:
1 │ <div ngCombobox filterMode="auto-select">
╵ ~~~~~~~~~~

X [ERROR] TS2551: Property '@ɵINPUT_SIGNAL_BRAND_WRITE_TYPE@1584' does not exist on type 'InputSignal'. Did you mean '@ɵINPUT_SIGNAL_BRAND_WRITE_TYPE@3762'? [plugin angular-compiler]
​

src/app/autocomplete/autocomplete.component.html:18:25:
18 │ <div ngOption [value]="country" [label]="country">
╵ ~~~~~


and a 3rd error for the label property.

I have checked my package versions and everything appears to be running off @21.0.1

Can anyone point me in the right direction here? Thanks.

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