* require tzinfo explicitely

ruby/lib/jam_ruby.rb

@@ -20,6 +20,7 @@ require 'resque_mailer'
 require 'rest-client'
 require 'zip'
 require 'csv'
+require 'tzinfo'
 
 require "jam_ruby/constants/limits"
 require "jam_ruby/constants/notification_types"

ruby/lib/jam_ruby/models/music_session.rb

@@ -981,6 +981,7 @@ SQL
           begin
             TZInfo::Timezone.get(tz_identifier)
           rescue Exception => e
+            puts("unable to find timezone=#{tz_identifier}, e=#{e}")
             @@log.error("unable to find timezone=#{tz_identifier}, e=#{e}")
             errors.add(:timezone, ValidationMessages::MUST_BE_KNOWN_TIMEZONE)
           end