title: PGAdmin: Not connected to the server or the connection to the server has been closed
body: <p>i got this problem with postgreSQL, when i do a simple query of anything (CRUD), sometimes it works and almost always shows this message:</p>
  
  <blockquote>
    <p>Not connected to the server or the connection to the server has been closed.</p>
  </blockquote>
  
  <p>I don't know how to solve it and it started to irritate me, anyone know how to fix it? </p>
  
  <p><strong>UPDATE 1</strong></p>
  
  <p>I have been searching and it seems the pgadmin4 the problem (it seems because it's not 100% developed yet), i have been using pgadmin3 and that error doesn't show up. </p>