Hi @rabusiak ,
you can take inspiration from the following tutorial in french :
https://ask.ocsinventory-ng.org/9249/installation-de-plugin-en-2-4
Otherwise, please pay attention to the creation of folders as it is case sensitive (Often, folder names start with a capital letter as well as for the Map.pm file).
Another thing: Right click on the agent icône only displays the inventory informations WITHOUT those of the plugins.
For which plugins ?
Regards, Stéphane