Hello
I'd just upgrade K2 from 2.6.0 to 2.6.1 on my J! 2.5.7 site
all seems fine except when I go in administration and select K2 / articles
I get a blank page
any suggestion?

Versione database 5.1.61
Collation database utf8_general_ci
Versione PHP 5.3.3
Web Server Apache
WebServer interfaccia PHP cgi-fcgi
Versione di Joomla! Joomla! 2.5.7 Stable [ Ember ] 13-September-2012 14:00 GMT
Versione piattaforma Joomla! Joomla Platform 11.4.0 Stable [ Brian Kernighan ] 03-Jan-2012 00:00 GMT
User Agent Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:16.0) Gecko/20100101 Firefox/16.0

Hi. A blank page usually indicates a PHP error. Turn on error reporting to see the error.

Hi
this is the error:
Fatal error: Call to a member function categoriesTree() on a non-object in /var/www/vhosts/suonidellamemoria.com/squilibri/25/administrator/components/com_k2/views/items/view.html.php on line 124

No suggestion?

I get the blank page with the same error after disabling the K2Mart plugin too

Please try to install the SVN version of K2 and let me know if that fix your issue. You can find the SVN version at getk2.org/assets/svn . Remember to backup your site first in case something goes wrong.

Sorry Lefteris, I downgraded the site to K2 2.5.7

Anyone facing this issue and having K2mart installed, please read forum.joomlaworks.net/k2mart_2x/k2-stopped-working/msg72564/#msg72564