Error "undefined method `to_datetime'" in sidekiq

Start sidekiq with the command

bundle exec sidekiq -e production -P /path/to/pid/file/tmp/pids/sidekiq.pid -L /path/to/log/file/shared/log/sidekiq.log --daemon

In the log error

2017-06-29T06:59:44.776Z 16181 TID-1jr7pg ERROR: CRON JOB: undefined method `to_datetime' for #<EtOrbi::EoTime:0x0000000a933848>
2017-06-29T06:59:44.776Z 16181 TID-1jr7pg ERROR: CRON JOB: /home/user/.rvm/gems/ruby-2.0.0-p247@script-admin/gems/activesupport-3.2.13/lib/active_support/core_ext/date_time/calculations.rb:141:in `<=>'

error while executing the method /home/user/.rvm/gems/ruby-2.0.0-p247@script-admin/gems/activesupport-3.2.13/lib/active_support/core_ext/date_time/calculations.rb:141:in <=>:

def <=> (other)
  super other.kind_of?(Infinity) ? other : other.to_datetime
end

What can be done with the problem?