Last time, k2 worked as usual as well.
But today, I insert new more items then It got these error on all my category and article

Notice: Trying to get property of non-object in /home/domainname/domains/domainname./public_html/web/libraries/joomla/factory.php on line 223 Notice: Trying to get property of non-object in /home/domainname./domains/domainname/public_html/web/libraries/joomla/factory.php on line 223 Notice: Trying to get property of non-object in /home/domainname/domains/domainname/public_html/web/libraries/joomla/factory.php on line 223 Notice: Trying to get property of non-object in /home/vbsc/domains/vbsc.vn/public_html/web/libraries/joomla/factory.php on line 223 Notice: Trying to get property of non-object in /home/domainname/domains/domainname/public_html/web/libraries/joomla/factory.php on line 223 Notice: Trying to get property of non-object in /home/domainname/domains/domainname/public_html/web/libraries/joomla/factory.php on line 223 Notice: Trying to get property of non-object in /home/domainname/domains/domainname/public_html/web/libraries/joomla/factory.php on line 223 Notice: Trying to get property of non-object in /home/domainname/domains/domainname/public_html/web/libraries/joomla/factory.php on line 223 

Please see details with pictures attach

Dear Dong Le,

Could you please send your site link on the issue to us?

Thanks!