No resource identifier found for attribute 'cardElevation' in package 'com.facebook.samples.audiencenetwork'
<p>I have tried to use Xamarin Android Facebook Component to native login to Facebook. but I get these two errorrs:</p>

<p>No resource identifier found for attribute 'cardElevation' in package 'com.facebook.samples.audiencenetwork'</p>

<p>No resource identifier found for attribute 'cardBackgroundColor' in package 'com.facebook.samples.audiencenetwork'</p>

<p>Would you please tell me how to solve it?</p>