My information:
OCS Inventory NG Agent:            2.4.0.0
I am trying to install Plugin without success. I downloaded plugins to folder /usr/share/ocsinventory-reports/ocsreports/download
[root@ocs download]# ll
-rw-r--r-- 1 apache apache  10975 Jul 24 15:59 bitlockerstatus.zip
-rw-r--r-- 1 root   root    12295 Jul 24 16:01 driverslist.zip
-rw-r--r-- 1 apache apache  20219 May 21  2017 officepack.zip
drwxr-xr-x 7 root   root     4096 Sep  4 14:26 PluginOcsOfficekey-2.2.4
-rw-r--r-- 1 root   root   104603 Mar 11  2014 PluginOcsOfficekey-2.2.4.tar.gz
-rwxr-xr-x 1 apache apache    127 Aug 31 11:38 README
-rw-r--r-- 1 apache apache  10548 May 21  2017 security.zip
-rwxr-xr-x 1 apache apache  10082 May 21  2017 winupdate.zip
[root@ocs download]#
Downloaded and copied .VBS file in agent folder location C:\Program Files (x86)\OCS Inventory Agent\Plugins
 Directory of C:\Program Files (x86)\OCS Inventory Agent\Plugins     ..
09/04/2018  01:59 PM            59,254 bitlockerstatus.vbs
07/24/2018  06:51 PM                 0 DO_NOT_REMOVE.txt
09/04/2018  02:13 PM           143,041 driverslist.vbs
   
From GUI, I go to Plugins Manager , choose the plugin and click on Install. But I am getting error
The communication server encountered the following error on install :  
Click here to solve your problem
Clicking on the above link takes me to https://github.com/OCSInventory-NG/OCSInventory-ocsreports/wiki/Plugins-Engine-:-Web-service-error-codes 
To troubleshoot I checked the folders mentioned in the above link and in my case all those folders are completely empty. 
If I go to GUI Plugins Manager and click on Install again, then it says that "This plugin has been already installed". But the OCS server is not showing any plugin information. I am not sure where I made mistake. 
Can you please help?
TIA.