Xamarin.Forms Android project breaks when installing Xamarin.Forms.Maps -

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i've been working on xamarin application, testing on android device windows pc. working well, came point had add maps integration app. followed steps outlined on xamarin developer website, installing xamarin.forms.maps nuget package, has caused android project refuse build.

first took more hour stuck trying build, after decided cancel build, gives me error of 'resource.attribute not contain definition actionbarsize'.


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