Unable to upgrade from 2.4.8.1 to 3.1.1.4

Software Support
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Did the PHP Fatal error occur in the section “[code: Installer Installer::provideSupplementaryFilesForReview]”?

See: Upgrading from 2.4.8-3 to 3.1.1-4: Call to a member function getFileId() on null in lib/pkp/classes/submission/PKPSubmissionFileDAO.inc.php - #4 by bozana

Note that if the upgrade fails with a fatal error, even if your system now self-reports as “3.1.1-4” when accessed as the Site Admin, the upgrade is NOT complete.