NewsArticle: image required for Article

Question

I to try to add an Image on my Code , how to tell here ,because Google Structured Data force it... , but every Time I come an error.. My Code;

<main vocab="http://schema.org"> 
<article typeof="NewsArticle" lang="en">
 <img property="contentUrl url" src="/index.php/Bilder/Virtualbox.png" alt="VirtualBox"/>

<header> 
 <h2 property="headline">Wie instaliert Virtual Box in Windows 10</h2>
   <br>
   <p property="description">News item summary goes here.</p>
</header> 

  <span property="name" value="Virtual Box"/>
  <span property="mainEntityOfPage" value="http://google.de"/>
  <span property="datePublished" value="2019-03-07"/>
  <span property="dateModified" value="2019-03-17"/>
  <span property="publisher" typeof="Organization">
     <span property="name">http://htmlkurss.xyz</span> 
     <span property="logo" typeof="ImageObject">
    <img property="contentUrl url" src="/index.php/Bilder/Virtualbox.png" alt="VirtualBox"/></span>
      </span>

  <p property="text">Virtual Box ist eine Virtualisierungssoftware, die viele Betriebessysteme emulieren kann. Sie funktioniert mit Linux , Mac und Windows. Sie hat auch veschiedenene Sprachen für ihre Oberfläche, wie beispielsweise Deutsch, Englisch ,... 
  </p>


  <footer>
  <p property="author" typeof="Person">Autor: <span property="name">http://htmlkurss.xyz</span></p>

  <p>Korrekturen: <span property="editor">Rolf B</span></p>
 </footer> 
</article>  

I don't know how does it ...

Can Please anyone help me for this Problem , Very Thanks !

New Edit:

unor tell here how to prevent it ,with hasPart ..., i does it.. I write on <article property="hasPart" typeof="NewsArticle"> , and come not more error , but come a Red cross , how the Screenshot to show..

Answer 1

I found the solution of my Problem....

My Problem was on third Line;

<img property="contentUrl url" src="/index.php/Bilder/Virtualbox.png" alt="VirtualBox"/>

I loose it , and add it...

<meta img property="image" src="/image/me.jpg">

Now come not a Warning !