Ok, well it’s back.
Obviously when someone wants to download a file I think?
[Wed Jul 01 13:59:23.619812 2020] [php7:notice] [pid 41822] [client 192.168.0.1:55607] PHP Notice: A non well formed numeric value encountered in /Users/robert/www/Chalmers/wp-content/plugins/download-manager/libs/class.DownloadStats.php on line 35