Google Play Store Internal Test cannot start roll out : <p>I am going to start rolling out the first version of the application to the internal testers.</p>

<p>But the button <code>START ROLLOUT TO INTERNAL TEST</code> is disabled and I cannot see any other error messages or warnings here.</p>

<p>Can anyone let me know what's going?
<a href="https://i.stack.imgur.com/uBJAX.png" rel="noreferrer">Screenshot attached</a></p>
