Hi all,
Regarding:
Call to a member function getFileId() on null in /ojs_temp/rc-3.1.1/lib/pkp/classes/submission/PKPSubmissionFileDAO.inc.php on line 1029
According to Change galley PDF published OJS 3.1.x - #8 by marc, reviewing the file permissions and re-running the upgrade corrected the issue.
Regards,
Alec Smecher
Public Knowledge Project Team