Redmine

Hello,

For every tickets created, I got this translation missing error instead of "Added by someone someday ago" under ticket subject.

Here is my environment info:

Environment:
Redmine version 3.4.5.stable
Ruby version 2.4.0-p0 (2016-12-24) [x86_64-linux]
Rails version 4.2.8
Environment production
Database adapter Mysql2
SCM:
Git 2.9.3
Filesystem
Redmine plugins:
clipboard_image_paste 1.12
line_numbers 1.0.0
redmine_absolute_dates 0.0.3
redmine_banner 0.1.2
redmine_custom_css 0.1.7
redmine_editor_preview_tab 0.1.5
redmine_issue_badge 0.0.6
redmine_issue_history 1.0.0
redmine_issue_templates 0.1.9
redmine_japanese_help 0.0.1
redmine_theme_changer 0.3.1
redmine_tweaks 1.0.2
redmine_wiki_extensions 0.8.1
sidebar_hide 0.0.8
view_customize 1.1.4