Apple developer - Invalid CSR, Invalid Certificate
<p>I generate <code>.certSigningRequest</code> file via Keychain Access (<code>Keychain Access -&gt; Certificate Assistant -&gt; Request a Certificate From a Certificate Authority...</code>, I fill in my mail and I save it to disk).</p>

<p>When I log into Apple developer account and try to generate Certificate with it I get message: "Invalid CSR - Invalid Certificate"</p>

<h1><a href="https://i.stack.imgur.com/mw0FS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/mw0FS.png" alt="enter image description here"></a></h1>

<p>What is reason for this? Why this message appears, what could be wrong?</p>

<p>I've seen several StackOverflow questions like this: <a href="https://stackoverflow.com/questions/994761/iphone-developer-portal-wont-accept-my-csr/3775958">iPhone Developer Portal won&#39;t accept my CSR</a> and I haven't found solution:</p>

<ul>
<li>I tried downloading WWDR certificate</li>
<li>I'm using Safari (but button works)</li>
<li>there is only one developer certificate on account...</li>
</ul>