your examples generate me:
<!DOCTYPE html>
<html>
<head>
<title>DLANG.ru</title>
</head>
<body>
<div id="app">
<div class="MainContainer">
<div class="footer">(c) DLANG 2017</div>
</div>
</div>
</body>
</html>
The only one modification that I did I changes pages names:
extends home
because my main page is home.dt
