more verif while installing

tpl/error.twig

@@ -0,0 +1,7 @@
+{% extends "layout.twig" %}
+{% block title %}{% trans "error" %}{% endblock %}
+{% block content %}
+    <h1>error</h1>
+        <p>{{ msg|raw }}</p>
+        <p>Don't forget <a href="http://inthepoche.com/?pages/Documentation">the documentation</a>.</p>
+{% endblock %}