title: PHP ImagickException: not authorized
body: <p>Any ideas how to fix this ?</p>
  
  <pre><code> ImagickException: not authorized `/tmp/magick-1552lvf2nIjaqx1W' @ error/constitute.c/ReadImage/412 
  </code></pre>
  
  <p>I thought it was a permission issue so just to test it out i set my /tmp dir to 777. No change. Its driving me crazy. </p>
  
  <p>The command :</p>
  
  <pre><code>&lt;?php
  
  
  $image = new \Imagick();
  $image-&gt;readImageBlob('&lt;?xml version="1.0" encoding="UTF-8" standalone="no"?&gt;' . $graph);
  </code></pre>