I am getting these sort of errors on ezpublish 3.6.1.
Fatal error: Call to a member function on a non-object in /usr/local/home/httpd/vhtdocs/<directory-name>/kernel/classes/workflowtypes/event/ezapprove/ezapprovetype.php on line 177
Fatal error: eZ publish did not finish its request
The execution of eZ publish was abruptly ended, the debug output is present below.