Redmine

Hello to all,
I'm having a problem with the class ActivitiesController.

In practice, the controller has lost the ability to filter with the Herve Harster variable, and consequently shows all events, whatever the project to which they belong.
could someone help me?
thanks in advance,
Andrea I.

Here below the information about my setup:

Environment:
Redmine version 2.3.1.stable
Ruby version 1.9.3 (i686-linux)
Rails version 3.2.13
Environment production
Database adapter Mysql2
Redmine plugins:
custom_user_fields 0.1.0
modal_windows 0.0.1
my_projects 1.3
progressive_projects_list 0.4.0
redmine_backlogs v1.0.6
redmine_better_gantt_chart 0.9.0
redmine_category_tree 0.0.3
redmine_closed_issue 0.0.1
redmine_extended_watchers 0.0.4
redmine_fields_permissions 1.0.0
redmine_github_hook 0.2.0
redmine_http_auth 0.3.0-dev
redmine_importer 1.0
redmine_issue_checklist 2.0.5
redmine_issue_detailed_tabs_time 0.0.7
redmine_issue_templates 0.0.6
redmine_issues_macros 0.0.1
redmine_login_audit 0.1.1
redmine_people 0.1.6
redmine_reminder 0.4
redmine_sidebar_toc_pt 1.3.0
redmine_smart_issues_sort 0.3.1
redmine_summed_fields 0.0.2
redmine_tkgmap 0.1
redmine_watcher_groups 0.0.1
redmine_webdav 0.6.0
redmine_wiki_extensions 0.6.3
redmine_wiki_issue_fields 0.4.1
redmine_wiki_lists 0.0.3
redshares 1.0.0
sidebar 0.1.1
timelog_on_issue_page 0.0.1
unread_issues 0.0.1