Windows Agent no connect to OCS Inventory Server

I use OCS Inventory Server and I installed OCS Inventory Agent on PC with Win7. From this PC I can open site http://192.168.20.20/ocsreports/ and default agent configuration with server address:  http://192.168.20.20/ocsinventory. In agent log Isee this Error 500:
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Starting OCS Inventory NG Agent on Tuesday, October 09, 2018 17:14:52.

AGENT => Running OCS Inventory NG Agent Version 2.4.0.0

AGENT => Using OCS Inventory NG FrameWork Version 2.4.0.0

AGENT => Loading plug-in(s)

AGENT => Using network connection with Communication Server

AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.4.0.0>

AGENT => Sending Prolog

AGENT => Prolog successfully sent

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 asked for Package Download

AGENT => Unloading communication provider

AGENT => Unloading plug-in(s)

AGENT => Execution duration: 00:00:18.

On Server in Apache Error log I see this:

[perl:error] [pid 1752] [client 192.168.78.2:1765] Undefined subroutine &Apache::Ocsinventory::Server::Inventory::Update::set_saas called at /usr/local/share/perl/5.24.1/Apache/Ocsinventory/Server/Inventory/Update.pm line 50.\n

In OCS Server Activiny log is clear.

0Can yoy help me? What's check?