The classes in the module cannot be loaded
<p>I am developing a 2D Unity android game in which i recently added Firebase Beta SDK, but after adding <code>FirebaseAnalytics.unitypackage</code> i am facing the error which is :</p>

<blockquote>
  <p>The classes in the module cannot be loaded.</p>
</blockquote>

<p>When i remove the folder <code>Firebase</code> from project the error no more appears. What can be the problem?
Thank you.</p>