Yarn ERROR: There are no scenarios; must have at least one : <p>I tried to install <a href="https://yarnpkg.com/lang/en/" rel="noreferrer">Yarn</a> and when I used the <code>yarn</code> command I got:</p>

<pre><code>00h00m00s 0/0: : ERROR: There are no scenarios; must have at least one.
</code></pre>

<p>my <code>yarn --version</code> is <code>0.32</code>. Why doesn't it work?</p>
