Error installation plugin NetXMS

Hello,

Adding the NetXMS Datasource via the NetXMS plugin does not seem to work.
I have no more information about this error, here is a screenshot of it

NetXMS using a MySQL database, I try to use the MySQL plugin and it turns out that it works well.

Namely that the server hosting NetXMS and Grafana are different, but that for the moment, no firewall is active

Regards