after upgrading from OJS 2.4.8 to 3.1.2, the file history (more information → history) is empty. This means I can’t get older versions of a file.
It seems to be the case for all files and may be related to the event log. There are no entries for submission file uploads or submission revision uploads.
When I add these events to the database, there are entries in the history, but the variables are not resolved and there are still no older file versions to download.