title: A critical error has occurred. Object reference not set to an instance of an object
body: <p>I was having problems with a skin that I could not uninstall, so I deleted it from the database.</p>
  
  <p>Now my extensions module does not work.</p>
  
  <p>I get this error, "A critical error has occurred. Object reference not set to an instance of an object."</p>
  
  <p>Anybody knows what caused it and eventual solutions?</p>