Redmine

Hello,

I have a 500 error when I delete a user into backend, can you help me?

Error into log/production.log

Completed 500 Internal Server Error in 126ms (ActiveRecord: 67.3ms)

NameError (uninitialized constant User::EasyTimesheet):
app/controllers/users_controller.rb:171:in `destroy'
lib/redmine/sudo_mode.rb:63:in `sudo_mode'

My config :
Debian 8.6

Environment:
Redmine version 3.3.1.stable
Ruby version 2.4.4-p296 (2018-03-28) [x86_64-linux]
Rails version 4.2.9
Environment production
Database adapter Mysql2
SCM:
Git 2.1.4
Filesystem
Redmine plugins:
before_render
ckeditor
clipboard_image_paste 1.9
sanitize
easy_extensions 2016
easy_agile_board 2016
easy_attendances 2016
easy_buttons 2016
easy_printable_templates 2016
easy_project_attachments 2016
easy_quick_project_planner 2016
easy_redmine
easy_to_do_list 2016
easy_xml_helper 2016
easy_baseline 1.3
easy_checklist 0.0.1
easy_gantt 1.8
easy_gantt_pro 1.8
easy_gantt_resources 1.5
easy_instant_messages 2016
easy_job 1.0.beta
easy_mindmup 1.0
easy_wbs 1.5
easy_web_hooks 2016
Server:
Current datetime 2018-08-22 10:30:14 +0000
Server datetime 2018-08-22 10:30:14 +0000
Database encoding latin1 / latin1_swedish_ci

Thanks for help