age occurs when an Istio resource references another resource that does
not exist. This will lead to errors when Istio tries to look up the referenced
resource but cannot find it.</p><p>For example, you receive this error:</p><pre><code class=language-plain data-expandlinks=true data-repo=istio>Error [IST0101] (VirtualService httpbin.default) Referenced gateway not found: &#34;httpbin-gateway-bogus&#34;
</code></pre><p>In this example, the <code>VirtualService</code> refers to a gateway that does not exist: