I've made several attempts without installation but without success, I put the plugin in the folder / usr / share / ocsinventory-reports / ocsreports / extensions / and in ocs when I go to install extension the following message appears: There is currently no extensions available for installation ( / usr / share / ocsinventory-reports / ocsreports / extensions /).
I did not find on the official website, the documentation if the plugin is compatible with version 2.7. If someone has managed to install, if you can pass the steps to me, I am grateful!