Works locally, but how to check from Nagios Server

H, thank you for this plugin,. It works great when I run it locally on the machine where Fail2Ban is running. But I cannot get it running remotely from the Nagios Server.

I tried to check it directly with adding “-H ” to your command syntax as well as configure a remote NRPE call from Nagios Server to the server where Fail2Ban is running. But the result is still the same: “Error: fail2ban-client not found”

What do I do wrong? Thank you, Jakub