I have installed agent 2.9 in more than 2000 machines but just one is not working properly.
Starting OCS Inventory Agent on Monday, March 21, 2022 11:03:33.
AGENT => Running OCS Inventory Agent Version 184.108.40.206
AGENT => Using OCS Inventory FrameWork Version 220.127.116.11
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory cURL Communication Provider> Version <18.104.22.168>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <Server returned nothing (no headers, no data)>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:01:28.
service is ok, but it is not showing the machine on the OCS portal.