Clients not registred

Hallo,

After upgrading to the most recent version of ocs, although the clients communicate with the server, their inventory is not finally sent.

I attach the log of a client

Starting OCS Inventory NG Agent on Thursday, October 20, 2016 09:44:28.
AGENT => Running OCS Inventory NG Agent Version 2.2.0.0
AGENT => Using OCS Inventory NG FrameWork Version 2.2.0.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.1.1.3>
AGENT => Sending Prolog
AGENT => Prolog successfully sent
SUPPORT => No support detected, Registration key : N/A
AGENT => Inventory required
AGENT => Launching hardware and software checks
AGENT => Sending Inventory
INVENTORY => Inventory changed since last run
ERROR *** AGENT => Failed to send Inventory <HTTP Status Code #500>
AGENT =>  Communication Server ask for Package Download
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:45.

and the corresponding log from the server

root:localhost:/var/log/ocsinventory-server:1026># tail -f /var/log/ocsinventory-server/activity.log | grep POLEO-THE-20

Thu Oct 20 09:44:28 2016;14509;311;POLEO-THE-20-2016-09-28-09-29-04;10.66.106.160;OCS-NG_WINDOWS_AGENT_v2.2.0.0;session;started

Thu Oct 20 09:45:13 2016;14577;319;POLEO-THE-20-2016-09-28-09-29-04;10.66.106.160;OCS-NG_WINDOWS_AGENT_v2.2.0.0;session;found

Thu Oct 20 09:45:13 2016;14577;104;POLEO-THE-20-2016-09-28-09-29-04;10.66.106.160;OCS-NG_WINDOWS_AGENT_v2.2.0.0;inventory;incoming

Thu Oct 20 09:45:13 2016;14577;515;POLEO-THE-20-2016-09-28-09-29-04;10.66.106.160;OCS-NG_WINDOWS_AGENT_v2.2.0.0;end;error

 

Also, I have to note that the PC's that do not manage to communicate, appear in terms of records in the prolog_conntrack table in the database.

thanks in advance