title: How to install extensions in contao 4.4
body: <p>I installed contao 4.4 in my localhost successfully.After successful installation I tried to install an extension via contao manager.Unfortunately it fails with console error.So I download zip file of extenson from <a href="https://codefog.pl/extension/news-categories.html#tab-support" rel="nofollow noreferrer">codefog</a></p>
  
  <p>and put it in the folder root/system/modules .But the extension is not found in backend.I think the extension is not installed successfully. How to make it works? Please help me.</p>