Cron notation not working on server

[jan javinto]

I'm using Sidekiq-cron in a Rails 5.1 application. I'm having jobs loaded via the config/schedule.yml file.

Until about two months ago this cron-job was perfectly working:

 

send_evaluation_message_job:
    # Every whole hour between 9am and 8pm, except sundays
    cron: "0 9-20 * * 1-6"
    class: "SendEvaluationMessageJob"

Now it's not anymore and I cannot figure out why. More remarkbly it's working locally on my machine, but not on my server in production mode!

When I change the cron notation to something like "0 * * * * *" then the job gets queued. Manually queueing the job works fine too.

What's wrong with this 0 9-20 * * 1-6 notation?

These are the gems I'm using:

* actioncable (5.1.4)
  * actionmailer (5.1.4)
  * actionpack (5.1.4)
  * actionview (5.1.4)
  * activejob (5.1.4)
  * activemodel (5.1.4)
  * activerecord (5.1.4)
  * activesupport (5.1.4)
  * acts_as_list (0.9.7)
  * airbrussh (1.3.0)
  * arel (8.0.0)
  * autoprefixer-rails (7.1.4)
  * bindex (0.5.0)
  * bootstrap (4.0.0.beta)
  * builder (3.2.3)
  * bundler (1.15.4)
  * byebug (9.1.0)
  * capistrano (3.9.1)
  * capistrano-bundler (1.2.0)
  * capistrano-passenger (0.2.0)
  * capistrano-rails (1.3.0)
  * capistrano-rvm (0.1.2)
  * capistrano-sidekiq (0.20.0)
  * climate_control (0.2.0)
  * cocaine (0.5.8)
  * coffee-rails (4.2.2)
  * coffee-script (2.4.1)
  * coffee-script-source (1.12.2)
  * concurrent-ruby (1.0.5)
  * connection_pool (2.2.1)
  * domain_name (0.5.20170404)
  * erubi (1.6.1)
  * et-orbi (1.0.5)
  * exception_notification (4.2.2)
  * execjs (2.7.0)
  * ffi (1.9.18)
  * friendly_id (5.1.0)
  * globalid (0.4.0)
  * haml (5.0.3)
  * http-cookie (1.0.3)
  * i18n (0.8.6)
  * jbuilder (2.7.0)
  * jquery-rails (4.3.1)
  * json (2.1.0)
  * libv8 (3.16.14.19)
  * listen (3.1.5)
  * loofah (2.0.3)
  * mail (2.6.6)
  * method_source (0.8.2)
  * mime-types (3.1)
  * mime-types-data (3.2016.0521)
  * mimemagic (0.3.2)
  * mini_portile2 (2.2.0)
  * minitest (5.10.3)
  * multi_json (1.12.2)
  * mysql2 (0.4.9)
  * net-scp (1.2.1)
  * net-ssh (4.2.0)
  * netrc (0.11.0)
  * nio4r (2.1.0)
  * nokogiri (1.8.0)
  * paperclip (5.1.0)
  * popper_js (1.11.1)
  * puma (3.10.0)
  * rack (2.0.3)
  * rack-protection (2.0.0)
  * rack-test (0.7.0)
  * rails (5.1.4)
  * rails-dom-testing (2.0.3)
  * rails-html-sanitizer (1.0.3)
  * rails_real_favicon (0.0.7)
  * railties (5.1.4)
  * rake (12.1.0)
  * rb-fsevent (0.10.2)
  * rb-inotify (0.9.10)
  * redis (4.0.1)
  * ref (2.0.0)
  * responders (2.4.0)
  * rest-client (2.0.2)
  * ruby_dep (1.5.0)
  * rubyzip (1.2.1)
  * rufus-scheduler (3.4.2)
  * sass (3.5.1)
  * sass-listen (4.0.0)
  * sass-rails (5.0.6)
  * sidekiq (5.0.5)
  * sidekiq-cron (0.6.3)
  * simple_form (3.5.0)
  * spring (2.0.2)
  * spring-watcher-listen (2.0.1)
  * sprockets (3.7.1)
  * sprockets-rails (3.2.1)
  * sqlite3 (1.3.13)
  * sshkit (1.14.0)
  * temple (0.8.0)
  * therubyracer (0.12.3)
  * thor (0.20.0)
  * thread_safe (0.3.6)
  * tilt (2.0.8)
  * tzinfo (1.2.3)
  * uglifier (3.2.0)
  * unf (0.1.4)
  * unf_ext (0.0.7.4)
  * web-console (3.5.1)
  * websocket-driver (0.6.5)
  * websocket-extensions (0.1.2)