command:
/usr/sbin/foreman-rake reports:expire days=7 --trace

output:
/usr/share/foreman/lib/foreman.rb:8: warning: already initialized constant Foreman::UUID_REGEXP
/usr/share/foreman/lib/foreman.rb:8: warning: previous definition of UUID_REGEXP was here
/usr/share/foreman/lib/core_extensions.rb:182: warning: already initialized constant ActiveSupport::MessageEncryptor::DEFAULT_CIPHER
/opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.6/lib/active_support/message_encryptor.rb:22: warning: previous definition of DEFAULT_CIPHER was here

• Invoke reports:expire (first_time)
• Invoke environment (first_time)
• Execute environment
• Execute reports:expire
  rake aborted!
  TypeError: can't convert NilClass into time interval
  /usr/share/foreman/app/models/report.rb:99:in `sleep'
  /usr/share/foreman/app/models/report.rb:99:in `block in expire'
  /usr/share/foreman/app/models/report.rb:82:in `loop'
  /usr/share/foreman/app/models/report.rb:82:in `expire'
  /usr/share/foreman/lib/tasks/reports.rake:39:in `block (3 levels) in <top (required)>'
  /usr/share/foreman/app/models/concerns/foreman/thread_session.rb:100:in `as'
  /usr/share/foreman/app/models/concerns/foreman/thread_session.rb:106:in `as_anonymous_admin'
  /usr/share/foreman/lib/tasks/reports.rake:38:in `block (2 levels) in <top (required)>'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/task.rb:250:in `block in execute'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/task.rb:250:in `each'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/task.rb:250:in `execute'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/task.rb:194:in `block in invoke_with_call_chain'
  /opt/rh/rh-ruby24/root/usr/share/ruby/monitor.rb:214:in `mon_synchronize'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/task.rb:187:in `invoke_with_call_chain'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/task.rb:180:in `invoke'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:152:in `invoke_task'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:108:in `block (2 levels) in top_level'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:108:in `each'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:108:in `block in top_level'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:117:in `run_with_threads'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:102:in `top_level'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:80:in `block in run'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:178:in `standard_exception_handling'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/lib/rake/application.rb:77:in `run'
  /opt/rh/rh-ruby24/root/usr/share/gems/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
  /opt/rh/rh-ruby24/root/usr/bin/rake:23:in `load'
  /opt/rh/rh-ruby24/root/usr/bin/rake:23:in `<main>'
  Tasks: TOP => reports:expire