illegal option: when generating singing certificate
<p>Herewith I have attached image of error.</p>

<p>I am trying to generate signing certificate and getting this error.</p>

<p><a href="https://i.stack.imgur.com/MCKE3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MCKE3.png" alt="enter image description here"></a></p>