title: What leads to "Could not find QtWebEngineProcess" error?
body: <p>I am triyng to port WebKit (Qt5.5.1) plugin to WebEngine (Qt5.11.3) one as described here: <a href="https://doc.qt.io/qt-5/qtwebenginewidgets-qtwebkitportingguide.html" rel="nofollow noreferrer">https://doc.qt.io/qt-5/qtwebenginewidgets-qtwebkitportingguide.html</a>
  Building and running in Ubuntu 18.04 I get following errors:</p>
  <pre><code>QXcbIntegration: Cannot create platform OpenGL context, neither GLX nor EGL are enabled
  </code></pre>
  <p>and then</p>
  <pre><code>Could not find QtWebEngineProcess
  </code></pre>
  <p>I am not sure if first one is related to second but second one leads to crash.</p>
  <p><strong>EDIT</strong>:
  I put QtWebEngineProcess from <code>Qt/libexec</code> dir to dir with binary and now second error changed to:</p>
  <pre><code>WebEngineContext used before initialize() or OpenGL context creation failed.
  </code></pre>
  <p>still crashes.</p>