OJS 2.4.8 to 3.1.1-4 Call to a member function getFileId()

This didn’t help

I tryied to upgrade its return the error untill I discover When trying to update my Ojs from version 2.4.2.3 to Ojs 3.x then this log appears a blank screen with no functionality. Does anyone know why this? - #10 by Juan_Pablo_Giron_Rui Than It start giving error again with Uncaught Error: Call to a member function getFileId() on null in /pkp/classes/file/SubmissionFileManager.inc.php:184
I recover all the files to data dir that I could and I get no progress.

I’m almost giving up this, more than one week working on this, and no progress