ojs2 has produced an error
  Message: WARNING: assert(): Assertion failed
  In file: /var/www/clients/client1/web5/web/ojs/classes/article/PublishedArticleDAO.inc.php
  At line: 430
  Stacktrace: 
  Server info:
   OS: Linux
   PHP Version: 5.6.40
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 5.1.73<br/>