title: Qtquick - QML Module not found
body: <p>I am getting started with qt and especially qt quick now and wanted to do the example from here: <a href="https://doc.qt.io/qt-5/qtquick3d-simple-example.html" rel="nofollow noreferrer">https://doc.qt.io/qt-5/qtquick3d-simple-example.html</a></p>
  <p>However already the line <code>import QtQuick3D 1.15</code> has been giving me headaches. The error that is printed says <strong>QML Module not found (QtQuick3D)</strong>. If I am trying to import other things, I get the corresponding errors.</p>
  <p>The error message also tells me <code>&quot;for qmake projects use the QML_IMPORT_PATH variable to add import paths&quot;</code> however I don't know what path and how I should set this?</p>
  <p>Another solution I have seen is the one suggested here: <a href="https://stackoverflow.com/a/64952178/13533641">https://stackoverflow.com/a/64952178/13533641</a>.
  Again I am unsure which path to add here. I tried &quot;/usr/lib/qt5/bin&quot; and &quot;/home/Qt/5.15.2/gcc_64/bin&quot;. After setting the value I restarted Qt Creator but the error remained.</p>
  <p>The project I have been using is an empty QT Quick application which you get if you create a new project. I just added that one import line.</p>
  <p>I have used the Mainainance Tools to check the plugins and I installed something that was named 3D. I am unsure if this is the &quot;normal&quot; qtwidget thing or the one I am trying to use in the code. (Or maybe there is no difference anyway, who knows)</p>
  <p>I use qt version 5.15 right now but I also tried installing the 5.9 and 6. Everywhere I have the same problem.
  My machine runs ubuntu 20.04 and I installed qt using the official download for linux.
  If I am correct, it got installed in the directory <code>/home/Qt</code>.</p>
  <p>Does anybody know how to solve this?</p>