I updated to Joomla 3.7 and shortly thereafter, my CiviCRM cron job started failing. When I hit the URL in a browser, I get:

Fatal error: Call to a member function get() on null in /home/public_html/libraries/joomla/session/handler/joomla.php on line 71

That's PHP 5.6.30 and it's a little different on PHP 7.0.16 (with max reporting on):

Error displaying the error page: Application Instantiation Error: Call to a member function get() on null

I'm using CiviCRM 4.7.18. This looks like a CiviCRM issue since my other cron job works fine.


1 Answer 1


It is not a civi issue - it is a joomla issue that impacts other modules as well the fix is in j 3.71 It is a 6 line patch and 1 line deletion

I have tested it and it works if you want to patch it yourself


  • Thanks! Words of wisdom: Always wait until the first maintenance release of a major update before you upgrade your site.
    – severdia
    Apr 28, 2017 at 18:23

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