No hreflang return tag detected by Google
<p>I have some indexing errors on Google Search Console saying that many pages of my site have an alternate version in another language but they miss the "return tag" , which i think is the pointer back to the "canonical" version in English.</p>

<p>For example this page is the canonical one in English <a href="http://www.thebitles.com/" rel="nofollow">http://www.thebitles.com/</a> which points to the spanish version through this meta tag</p>

<pre><code>    &lt;link rel="alternate" hreflang="es" href="/es/" /&gt;
</code></pre>

<p>And the Spanish version is <a href="http://www.thebitles.com/es/" rel="nofollow">http://www.thebitles.com/es/</a>
which points back to the canonical version through this tag</p>

<pre><code>&lt;link rel="canonical" hreflang="en" href="/" /&gt;
</code></pre>

<p>I can't figure out where is the error, the return tags are there.
Anyone has an idea? Thanks</p>