title: SOAP request works with SoapUI but not with Savon, how to debug?
body: <p>I tested a SOAP API in SoapUI and it worked just fine.</p>
  
  <p>I then implemented the same request in my Rails 5 app using Savon. It worked for a few weeks and then stopped working. SoapUI still works so the API provider of course tells me that the error is in my app.</p>
  
  <p>The error I get is very generic:</p>
  
  <pre><code>404 not found
  The requested URL was not found on this server.
  </code></pre>
  
  <ol>
  <li>It worked in my app</li>
  <li>Now it does not work anymore in my app</li>
  <li>In SoapUI the request works</li>
  </ol>
  
  <p>I tried adding <code>log_level: :debug</code> to my client but do not get any more details.</p>
  
  <pre><code>client = Savon.client(wsdl: 'URL')
  response = client.call(:action, message: {})
  </code></pre>
  
  <p>Any ideas on how to start debugging this?</p>