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+<!DOCTYPE html>
+<html>
+<head>
+ <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+ <title>Notifications center - 502 error</title>
+ <style>
+ body {
+ margin: 1em 0 0 0;
+ text-align: center;
+ background-color: #343434;
+ color: #40C1AC;
+ }
+
+ a, a:visited, a:link {
+ color: #01B1AE;
+ }
+ </style>
+</head>
+<body>
+ <pre>
+╔═════════════════════════════════════════════════════════════════════════╗
+║ ║
+║ Nasqueron - Notifications center ║
+║ ║
+╚═════════════════════════════════════════════════════════════════════════╝
+
+╔═════════════════════════════════════════════════════════════════════════╗
+║ ║
+║ +---------------+ ║
+║ | | ║
+║ | 502 | +----------------------+ ║
+║ | +---------------------------> | | ║
+║ | Gateway not | | Please retry | ║
+║ | responsive. +------------+ | in a few | ║
+║ | || | | minutes. | ║
+║ +----+----------| +--------------------------+ | ║
+║ | || | | | | If not, check | ║
+║ | +------------+ | | our <a href="http://status.nasqueron.org/">status</a> | ║
+║ | | | Some systems | | or request | ║
+║ | | | could emit | | <a href="http://purl.net/NET/Nasqueron/Support">support</a>. | ║
+║ | | | notifications. | | | ║
+║ | | | | | | ║
+║ | +-------------------+ +----------------------+ ║
+║ | | | | | | ║
+║ | | | | | They propagate | +++ ║
+║ +----------+ | | events for other | +---------->-+++ ║
+║ | | | systems and apps. | +++ ║
+║ | | | | | ║
+║ | | | +-------------------------+ | ║
+║ | | | | | | | ║
+║ | +--------------------------+ | | ║
+║ | | | | | ║
+║ +---------------------------------+ Other receive | <----+ ║
+║ || | | | them. Even | ║
+║ || | | | sometimes handle | ║
+║ +--------------------+ | | them. | ║
+║ | | | | ║
+║ | | | | ║
+║ | +-------------------------+ ║
+║ | | ║
+║ +---------------------------------+ ║
+║ ║
+╚═════════════════════════════════════════════════════════════════════════╝
+
+ </pre>
+</body>
+</html>