Failed to send Inventory

hi, install agent in ocs inventory v.2.8 and agent 2.8 and error # 403 appears

Starting OCS Inventory Agent on Tuesday, July 20, 2021 12:00:14.

AGENT => Running OCS Inventory Agent Version 2.8.0.0

AGENT => Using OCS Inventory FrameWork Version 2.8.0.0

AGENT => Loading plug-in (s)

AGENT => Using network connection with Communication Server

AGENT => Using Communication Provider <OCS Inventory cURL Communication Provider> Version <2.8.0.0>

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 # 403>

AGENT => Communication Server asked for Package Download

AGENT => Unloading communication provider

AGENT => Unloading plug-in (s)

AGENT => Execution duration: 00:00:21.

some help

Thank you