Sidekiq - undefined method `retrieve_work'

0 [before] Gemfile

ruby "2.6.6"
gem "rails", "6.0.3.2"

gem "redis", "~> 4.1.4"
gem "sidekiq-ent", source: "https://enterprise.contribsys.com/"
gem "sidekiq-pro", source: "https://enterprise.contribsys.com/"

1 [before] Gemfile.lock

    redis (4.1.4)
    
    ...
    
    sidekiq (6.0.7)
      connection_pool (>= 2.2.2)
      rack (~> 2.0)
      rack-protection (>= 2.0.0)
      redis (>= 4.1.0)
    sidekiq-ent (2.0.1)
      einhorn (>= 0.7.4)
      sidekiq (>= 6.0.2)
      sidekiq-pro (>= 5.0.1)
    sidekiq-pro (5.0.1)
      concurrent-ruby (>= 1.0.5)
      sidekiq (>= 6.0.1)

2 [before] `bundle exec sidekiq -c 1`

2020-07-01T00:19:10.439Z pid=24043 tid=ovmhanm3z INFO: Booted Rails 6.0.3.2 application in development environment
2020-07-01T00:19:10.440Z pid=24043 tid=ovmhanm3z INFO: Running in ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-darwin19]
2020-07-01T00:19:10.440Z pid=24043 tid=ovmhanm3z INFO: Sidekiq Pro 5.0.1 / Sidekiq Enterprise 2.0.1, commercially licensed.
2020-07-01T00:19:10.440Z pid=24043 tid=ovmhanm3z INFO: Booting Sidekiq 6.0.7 with redis options {}
2020-07-01T00:19:10.444Z pid=24043 tid=ovmhanm3z INFO: Starting processing, hit Ctrl-C to stop
2020-07-01T00:19:10.451Z pid=24043 tid=ovm9wxjoz INFO: Managing 28 periodic jobs
2020-07-01T00:19:10.452Z pid=24043 tid=ovm9wxjoz INFO: Gained leadership of the cluster

3 [after] Gemfile

ruby "2.6.6"
gem "rails", "6.0.3.2"

gem "redis", "~> 4.2.1"
gem "sidekiq-ent", source: "https://enterprise.contribsys.com/"
gem "sidekiq-pro", source: "https://enterprise.contribsys.com/"

4 [after] Gemfile.lock

    redis (4.2.1)
    
    ...
    
    sidekiq (6.1.0)
      connection_pool (>= 2.2.2)
      rack (~> 2.0)
      redis (>= 4.2.0)
    sidekiq-ent (2.1.0)
      einhorn (>= 0.7.4)
      sidekiq (>= 6.1.0)
      sidekiq-pro (>= 5.1.0)
    sidekiq-pro (5.1.0)
      connection_pool (>= 2.2.3)
      sidekiq (>= 6.1.0)

5 [after] `bundle exec sidekiq -c 1`

2020-07-01T00:40:53.911Z pid=30265 tid=oujd0wl11 INFO: Booted Rails 6.0.3.2 application in development environment
2020-07-01T00:40:53.911Z pid=30265 tid=oujd0wl11 INFO: Running in ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-darwin19]
2020-07-01T00:40:53.911Z pid=30265 tid=oujd0wl11 INFO: Sidekiq Pro 5.1.0 / Sidekiq Enterprise 2.1.0, commercially licensed.
2020-07-01T00:40:53.911Z pid=30265 tid=oujd0wl11 INFO: Booting Sidekiq 6.1.0 with redis options {}
2020-07-01T00:40:53.913Z pid=30265 tid=oujd0wl11 INFO: Starting processing, hit Ctrl-C to stop
2020-07-01T00:40:53.916Z pid=30265 tid=ouiua8ps1 ERROR: Error fetching job: undefined method `retrieve_work' for Sidekiq::Pro::BasicFetch:Module
2020-07-01T00:40:53.916Z pid=30265 tid=ouiua8ps1 WARN: NoMethodError: undefined method `retrieve_work' for Sidekiq::Pro::BasicFetch:Module
2020-07-01T00:40:53.920Z pid=30265 tid=ouiua8ps1 WARN: /usr/local/var/rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/sidekiq-6.1.0/lib/sidekiq/processor.rb:83:in `get_one'
/usr/local/var/rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/sidekiq-6.1.0/lib/sidekiq/processor.rb:95:in `fetch'
/usr/local/var/rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/sidekiq-6.1.0/lib/sidekiq/processor.rb:77:in `process_one'
/usr/local/var/rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/sidekiq-6.1.0/lib/sidekiq/processor.rb:68:in `run'
/usr/local/var/rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/sidekiq-6.1.0/lib/sidekiq/util.rb:15:in `watchdog'
/usr/local/var/rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/sidekiq-6.1.0/lib/sidekiq/util.rb:24:in `block in safe_thread'
2020-07-01T00:40:53.920Z pid=30265 tid=ouiua8n6p INFO: Managing 28 periodic jobs
2020-07-01T00:40:53.921Z pid=30265 tid=ouiua8n6p INFO: Gained leadership of the cluster