Error:(27, 0) Project with path ':library' could not be found in project ':app'
<p>I have copied <a href="https://github.com/traex/RippleEffect/tree/master/library" rel="noreferrer">this</a> <code>library</code> folder in root of project but always getting:</p>

<pre><code>Error:(27, 0) Project with path ':library' could not be found in project ':app'.
&lt;a href="openFile:/home/oreo/Projects/RippleSample/app/build.gradle"&gt;Open File&lt;/a&gt;
</code></pre>

<p>Here is the Project structure:</p>

<pre><code>RippleSample
   &gt; .gradle
   &gt; .idea
   &gt; app
   &gt; gradle
   &gt; library [just imported]
</code></pre>