install on redmine 5.1.1

[a-sapuppo]

i have this info:

Environment:
  Redmine version                5.1.1.stable
  Ruby version                   2.7.4-p191 (2021-07-07) [x86_64-linux-gnu]
  Rails version                  6.1.7.6
  Environment                    production
  Database adapter               Mysql2
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                smtp
Redmine settings:
  Redmine theme                  Default
SCM:
  Subversion                     1.14.1
  Git                            2.30.2
  Filesystem                     
Redmine plugins:
  redmine_contacts               4.3.8

my install script:

cd /usr/share/redmine-5.1.1/plugins
git clone https://github.com/Enkil/redmine_reminder.git
cd /usr/share/redmine-5.1.1/plugins/redmine_reminder
gem install factory_girl_rails
gem install shoulda-matchers
sudo apt install libyaml-dev
gem install yaml
bundle install
bundle exec rake redmine:plugins:migrate RAILS_ENV=production
rake aborted!
LoadError: cannot load such file -- lib/tasks/reminder
/usr/share/redmine-5.1.1/plugins/redmine_reminder/Rakefile:3:in `require'
/usr/share/redmine-5.1.1/plugins/redmine_reminder/Rakefile:3:in `<top (required)>'
/var/lib/gems/2.7.0/gems/rake-13.1.0/exe/rake:27:in `<top (required)>'
(See full trace by running task with --trace)