User creation and Deletion from Red Hat Satellite 6 Web-ui fails with Internal Server error message.

Issue

• User creation and Deletion from Satellite Web-ui fails with Internal Server error message on portal and below traceback in /var/log/foreman/production.log:

2017-01-17 09:24:28 [app] [I]   Parameters: {"utf8"=>"✓", "authenticity_token"=>"chO4mBZbI6cACiLAEAGJ83AVLhQzHkHWtDRiWNJdMgo=", "user"=>{"login"=>"Neo.local", "firstname"=>"Neo", "lastname"=>"Adreson", "mail"=>"neo.adreson@example.com", "locale"=>"", "timezone"=>"", "auth_source_id"=>"1", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]", "mail_enabled"=>"1", "admin"=>"0", "role_ids"=>[""], "location_ids"=>[""], "default_location_id"=>"", "organization_ids"=>["", "1"], "default_organization_id"=>""}}
2017-01-17 09:24:28 [app] [I]   Rendered user_mailer/welcome.text.erb (0.5ms)
2017-01-17 09:24:58 [app] [I] 
 | Sent mail to neo.adreson@example.com (30007.6ms)
2017-01-17 09:24:58 [app] [W] Action failed
 | Net::OpenTimeout: execution expired
 | /opt/rh/rh-ruby22/root/usr/share/ruby/net/smtp.rb:541:in `initialize'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/net/smtp.rb:541:in `open'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/net/smtp.rb:541:in `tcp_socket'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/net/smtp.rb:551:in `block in do_start'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:89:in `block in timeout'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:99:in `call'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:99:in `timeout'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/net/smtp.rb:550:in `do_start'
 | /opt/rh/rh-ruby22/root/usr/share/ruby/net/smtp.rb:520:in `start'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/mail-2.5.4/lib/mail/network/delivery_methods/smtp.rb:112:in `deliver!'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/mail-2.5.4/lib/mail/message.rb:2129:in `do_delivery'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/mail-2.5.4/lib/mail/message.rb:232:in `block in deliver'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionmailer-4.1.5/lib/action_mailer/base.rb:527:in `block in deliver_mail'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/notifications.rb:159:in `block in instrument'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/notifications.rb:159:in `instrument'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionmailer-4.1.5/lib/action_mailer/base.rb:525:in `deliver_mail'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/mail-2.5.4/lib/mail/message.rb:232:in `deliver'
 | /usr/share/foreman/app/models/mail_notification.rb:41:in `deliver'
 | /usr/share/foreman/app/models/user.rb:418:in `welcome_mail'