Improve error handling

Change-Id: I1f54cf9cd4770d6602f70036cf0e27c9ede8c893
diff --git a/templates/exception.html.ep b/templates/exception.html.ep
index 7d8af3b..af0aaf6 100644
--- a/templates/exception.html.ep
+++ b/templates/exception.html.ep
@@ -1,6 +1,6 @@
 % my $msg = $exception->message // '500: Internal Server Error';
 % layout 'main', title => 'KorAP: ' . $msg;
 
-<p id="no-results"><%= $msg  %></p>
+<p class="no-results"><%= $msg  %></p>
 
 % notify('error' => $msg);