<p>According to <a href="https://cert-manager.io/docs/installation/kubernetes/" rel="nofollow noreferrer">cert-manager installation docs</a> jetstack repository should be added:</p>
<blockquote>
<p>$ helm repo add jetstack <a href="https://charts.jetstack.io" rel="nofollow noreferrer">https://charts.jetstack.io</a></p>
</blockquote>
<p>It gives error message:</p>
<blockquote>
<p>Error: looks like &quot;https://charts.jetstack.io&quot; is not a valid chart repository or cannot be reached: error unmarshaling JSON: while decoding JSON: json: unknown field &quot;serverInfo&quot;</p>
</blockquote>
<p>What are the ways to fix the issue?</p>

<p>This looks to be caused by a patch done in Version 3.3.2 of Helm for security based issues.</p>
<p>Reference Issue: <a href="https://github.com/helm/helm/issues/8761" rel="nofollow noreferrer">https://github.com/helm/helm/issues/8761</a></p>
<p>Security Patch: <a href="https://github.com/helm/helm/pull/8762" rel="nofollow noreferrer">https://github.com/helm/helm/pull/8762</a></p>
