diff --git a/modules/bnporc/pp/pages.py b/modules/bnporc/pp/pages.py
index b5977a989dc07e94939dfe4781291844de2175bb..9c2db1b68e2f8ff0f39371a0171e95002169d3a8 100644
--- a/modules/bnporc/pp/pages.py
+++ b/modules/bnporc/pp/pages.py
@@ -25,6 +25,7 @@
 from random import randint
 from decimal import Decimal
 from datetime import datetime, timedelta
+import lxml.html as html
 
 from weboob.browser.elements import DictElement, ListElement, TableElement, ItemElement, method
 from weboob.browser.filters.json import Dict
@@ -219,6 +220,12 @@ def on_load(self):
             else:
                 assert False, 'Unexpected error at login: "%s" (code=%s)' % (msg, error)
 
+        parser = html.HTMLParser(encoding=self.encoding)
+        doc = html.parse(BytesIO(self.content), parser)
+        error = CleanText('//div[h1[contains(text(), "Incident en cours")]]/p')(doc)
+        if error:
+            raise BrowserUnavailable(error)
+
     def login(self, username, password):
         url = '/identification-wspl-pres/grille/%s' % self.get('data.grille.idGrille')
         keyboard = self.browser.open(url)