Deleted files are not deleted

The files are deleted on my local PC but not on the server (Dreamhost).
When with the admin, I have a look in the Deleted files bin, I see old files (5 months) even after specifying
’trashbin_retention_obligation’ => ‘30, 45’,
in the config.php as mentionned here

Thanks for any help

And your cronjob is run regularly without errors (-> check logfile)? If yet, please open bug report on github.

I’ve tested with a new cron job running from Dreamhost panel and I’ve got this message.
Maybe I’m missing something. Can you please assist? Thank you!

/home/server/cron.php: line 1: ?php: No such file or directory
/home/server/cron.php: line 2: /bin: Is a directory
/home/server/cron.php: line 3: syntax error near unexpected token (' /home/server/cron.php: line 3: * @copyright Copyright © 2016, ownCloud, Inc.’