Winusers : output is not a valid XML document

Hello,

I'm trying to install the latest version of Winusers (v2.2) on the latest version of OCSinventory. With that pluging, I get the following in the log file :

Starting OCS Inventory NG Agent on Saturday, May 09, 2020 16:31:14.
AGENT => Running OCS Inventory NG Agent Version 2.6.0.1
AGENT => Using OCS Inventory NG FrameWork Version 2.6.0.1
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.6.0.0>
AGENT => Sending Prolog
AGENT => Prolog successfully sent
AGENT => Inventory required
AGENT => Launching hardware and software checks
ERROR *** EXECUTABLE PLUGIN => Executable plugin <C:\Program Files\OCS Inventory Agent\plugins\winusers.ps1> output is not a valid XML document
AGENT => Sending Inventory
INVENTORY => Inventory changed since last run
AGENT => Inventory successfully sent
AGENT =>  Communication Server asked for Package Download
DOWNLOAD => Download and setup tool successfully started
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:01:06.

Any idea ? Many thanks !
Damien