Hi @asmecher,
I got the same error while upgrading from 2.4.6 to 3.0.1:
PHP Warning: assert(): Assertion failed in /var/www/www.jld.edu.au/versions/3.0.1/lib/pkp/classes/submission/PKPSubmissionFileDAO.inc.php on line 380
<h1>There are no readable files in this directory tree. Are safe mode or open_basedir active?</h1>ojs2: There are no readable files in this directory tree. Are safe mode or open_basedir active?
Is there a solution found for this yet? I can send you the sql dump of our db before upgrade.
Thanks
Ghazal