Installing a plugin
1. Copy your plugin directory into #{RAILS_ROOT}/plugins.
1a. Realtime transport (#17938): copy this plugin's config/cable.yml into
    Redmine's own config dir, i.e. #{RAILS_ROOT}/config/cable.yml. ActionCable /
    solid_cable read it from there at boot (it cannot be shipped from inside the
    plugin). Then install the added gem:
        bundle install
2. Make db backup.
3. Run the following command in #{RAILS_ROOT} to upgrade your database.
RAILS_ENV=production NAME=redmine_time_tracker_administrator  bundle exec rake redmine:plugins:migrate
4. Restart Redmine
5. Enable REST web service option at Administration->Settings->API (check 'Enable REST web service' checkbox).

6. For Redmine version 6.1 and later only run the following commands

These commands compile assets.

RAILS_ENV=production bundle exec rake assets:clobber 
RAILS_ENV=production bundle exec rake assets:precompile 

Run the following commands to 
You should now be able to see the plugin list in Administration -> Plugins and configure the newly installed plugin (if the plugin requires to be configured).


Check path
settings/plugin/redmine_time_tracker_administrator

Make sure that plugin is enabled.
Need to insert license key and save to use the plugin.