The error messages we are receiving are as below. They do not clearly identify Download Manager but by disabling plugins one at a time I realised we only receive these errors when Download Manager is Active.
[Mon Oct 08 04:20:09.167592 2018] [fcgid:emerg] [pid 3455168] (22)Invalid argument: [client 17.58.102.252:57536] mod_fcgid: can’t lock process table in pid 3455168
FTP Host: web2.pipeten.co.uk
Let me know if you need any further info.
Thanks,
Chris