Redmine

I'm building the redmine (v3) on my local space using a Ubuntu 16 virtual machine

And i'm trying to add a plugin to the redmine's platform.

Here is what i did so far:
- Download/unzip the plugin
- Installed all the required gems (missed some, but its fine now)
- I used bundle install --without development test --no-deployment on this path: /var/www/html/redmine (my root) and after i tried to use the bundle exec rake redmine:plugins NAME=redmine_agile RAILS_ENV=production command. But this command return that the plugin was not found

Here is my plugin structure: /var/www/html/redmine/plugins/redmine_agile

drwxr-x--- 6 root root 4096 Mai 30 15:59 app
drwxr-x--- 5 root root 4096 Mai 30 15:59 assets
drwxr-x--- 3 root root 4096 Mai 30 15:59 config
drwxr-x--- 3 root root 4096 Mai 30 15:59 db
drwxr-x--- 2 root root 4096 Mai 30 15:59 doc
- rwxr-x--- 1 root root 2406 Mai 30 15:59 init.rb
drwxr-x--- 4 root root 4096 Mai 30 15:59 lib
- rwxr-x--- 1 root root 557 Mai 30 15:59 README.rdoc
drwxr-x--- 7 root root 4096 Mai 30 15:59 test

I guess the folder's structure and the gems are fine, but im not sure why i receive this error when using the command bundle exec rake ....

(in /usr/share/redmine)
Plugin redmine_checklists was not found.