Hi,
I need help with K2 User Login and Logout functionality. Actually, my customer wants to have, for their staff, a login via Frontend like on the old website.
Sometimes, I can log-in, but not logout. I tried to set many many different login module settings, settings for the user, etc, but not successful:

Warnung

The security token did not match. The request was aborted to prevent any security breach. Please try again.

I use last Joomla installation 3.9.23, and all plugins are updated to the last version.
Here is my FPA:
Forum Post Assistant (v1.6.2) : 4-Dec-2020 wrote:
Basic Environment :: wrote:
Joomla! Instance :: Joomla! 3.9.23-Stable (Amani) 24-November-2020
Joomla! Platform :: Joomla Platform 13.1.0-Stable (Curiosity) 24-Apr-2013
Joomla! Configured :: Yes | Read-Only (444) |
Configuration Options :: Offline: false | SEF: true | SEF Suffix: false | SEF ReWrite: true | .htaccess/web.config: Yes | GZip: false | Cache: false | CacheTime: 15 | CacheHandler: file | CachePlatformPrefix: false | FTP Layer: false | Proxy: false | LiveSite: | Session lifetime: 15 | Session handler: none | Shared sessions: false | SSL: 0 | Error Reporting: none | Site Debug: false | Language Debug: false | Default Access: 1 | Unicode Slugs: false | dbConnection Type: mysqli | PHP Supports J! 3.9.23: Yes | Database Supports J! 3.9.23: Yes | Database Credentials Present: Yes |

Host Configuration :: OS: Linux | OS Version: 3.10.0-1127.19.1.el7.x86_64 | Technology: x86_64 | Web Server: Apache | Encoding: gzip, deflate, br | System TMP Writable: Yes | Free Disk Space : 634.49 GiB |

PHP Configuration :: Version: 7.4.13 | PHP API: fpm-fcgi | Session Path Writable: Yes | Display Errors: | Error Reporting: 22527 | Log Errors To: | Last Known Error: | Register Globals: | Magic Quotes: | Safe Mode: | Allow url fopen: on | Open Base: | Uploads: 1 | Max. Upload Size: 50M | Max. POST Size: 75M | Max. Input Time: 60 | Max. Execution Time: 60 | Memory Limit: 256M

Database Configuration :: Version: 10.4.15-MariaDB (Client:mysqlnd 7.4.13) | Database Size: 20.54 MiB | #of Tables with config prefix: 205 | #of other Tables: 0 | User Privileges : GRANT ALL
Detailed Environment :: wrote:
PHP Extensions :: Core (7.4.13) | date (7.4.13) | libxml (7.4.13) | openssl (7.4.13) | pcre (7.4.13) | zlib (7.4.13) | filter (7.4.13) | hash (7.4.13) | Reflection (7.4.13) | SPL (7.4.13) | session (7.4.13) | standard (7.4.13) | cgi-fcgi (7.4.13) | bcmath (7.4.13) | bz2 (7.4.13) | calendar (7.4.13) | ctype (7.4.13) | curl (7.4.13) | dba (7.4.13) | dom (20031129) | mbstring (7.4.13) | fileinfo (7.4.13) | ftp (7.4.13) | gd (7.4.13) | gettext (7.4.13) | gmp (7.4.13) | iconv (7.4.13) | imap (7.4.13) | intl (7.4.13) | json (7.4.13) | ldap (7.4.13) | exif (7.4.13) | mysqlnd (mysqlnd 7.4.13) | PDO (7.4.13) | pgsql (7.4.13) | Phar (7.4.13) | posix (7.4.13) | shmop (7.4.13) | SimpleXML (7.4.13) | soap (7.4.13) | sockets (7.4.13) | sodium (7.4.13) | sqlite3 (7.4.13) | sysvmsg (7.4.13) | sysvsem (7.4.13) | sysvshm (7.4.13) | tokenizer (7.4.13) | xml (7.4.13) | xmlwriter (7.4.13) | xsl (7.4.13) | mcrypt (1.0.3) | mysqli (7.4.13) | pdo_mysql (7.4.13) | pdo_pgsql (7.4.13) | pdo_sqlite (7.4.13) | xmlreader (7.4.13) | xmlrpc (7.4.13) | apcu (5.1.19) | brotli (0.11.1) | imagick (3.4.4) | mailparse (3.1.1) | ssh2 (1.2) | zip (1.19.2) | ionCube Loader (10.4.5) | Zend OPcache (7.4.13) | Zend Engine (3.4.0) |
Potential Missing Extensions ::

Switch User Environment :: PHP CGI: No | Server SU: No | PHP SU: No | Potential Ownership Issues: No
Folder Permissions :: wrote:
Core Folders :: images/ (755) | components/ (755) | modules/ (755) | plugins/ (755) | language/ (755) | templates/ (755) | cache/ (755) | logs/ (755) | tmp/ (755) | administrator/components/ (755) | administrator/modules/ (755) | administrator/language/ (755) | administrator/templates/ (755) | administrator/logs/ (750) |

Elevated Permissions (First 10) ::
Database Information :: wrote:
Database statistics :: Uptime: 242285 | Threads: 33 | Questions: 58181121 | Slow queries: 3138261 | Opens: 254823 | Flush tables: 1 | Open tables: 400 | Queries per second avg: 240.135 |
Extensions Discovered :: wrote:
Components :: Site ::
Core :: com_mailto (3.0.0) 1 | com_wrapper (3.0.0) 1 |
3rd Party::

Components :: Admin ::
Core :: com_associations (3.7.0) 1 | com_plugins (3.0.0) 1 | com_checkin (3.0.0) 1 | com_tags (3.1.0) 1 | com_banners (3.0.0) 0 | com_ajax (3.2.0) 1 | com_cpanel (3.0.0) 1 | com_postinstall (3.2.0) 1 | com_content (3.0.0) 1 | com_users (3.0.0) 1 | com_messages (3.0.0) 1 | com_templates (3.0.0) 1 | com_admin (3.0.0) 1 | com_redirect (3.0.0) 1 | com_search (3.0.0) 1 | com_privacy (3.9.0) 1 | com_cache (3.0.0) 1 | com_menus (3.0.0) 1 | com_languages (3.0.0) 1 | com_finder (3.0.0) 1 | com_joomlaupdate (3.6.2) 1 | com_fields (3.7.0) 1 | com_installer (3.0.0) 1 | com_media (3.0.0) 1 | com_newsfeeds (3.0.0) 0 | com_config (3.0.0) 1 | com_contenthistory (3.2.0) 1 | com_login (3.0.0) 1 | com_actionlogs (3.9.0) 1 | com_categories (3.0.0) 1 | com_modules (3.0.0) 1 |
3rd Party:: Smart Slider 3 (3.4.1.14) 1 | FlexiContact (12.11.01) 1 | COM_K2 (2.10.3) 1 | Akeeba (7.4.0.1) 1 | com_uniterevolution2 (4.6.5 b1) 1 | com_mobilemenuck (1.2.7) 1 | System - Mobile Menu CK (1.2.7) 1 |

Modules :: Site ::
Core :: mod_articles_categories (3.0.0) 1 | mod_random_image (3.0.0) 1 | mod_articles_archive (3.0.0) 1 | mod_articles_popular (3.0.0) 1 | mod_custom (3.0.0) 1 | mod_footer (3.0.0) 1 | mod_stats (3.0.0) 1 | mod_related_items (3.0.0) 1 | mod_banners (3.0.0) 0 | mod_menu (3.0.0) 1 | mod_articles_latest (3.0.0) 1 | mod_tags_similar (3.1.0) 1 | mod_users_latest (3.0.0) 1 | mod_login (3.0.0) 1 | mod_articles_news (3.0.0) 1 | mod_whosonline (3.0.0) 1 | mod_finder (3.0.0) 1 | mod_articles_category (3.0.0) 1 | mod_wrapper (3.0.0) 1 | mod_search (3.0.0) 1 | mod_breadcrumbs (3.0.0) 1 | mod_tags_popular (3.1.0) 1 | mod_feed (3.0.0) 1 | mod_languages (3.5.0) 1 | mod_syndicate (3.0.0) 1 |
3rd Party:: K2 Content (2.10.3) 1 | JF Mobile Menu (1.3) 1 | Unite Revolution Slider 2 (4.6.5 b1) 1 | K2 User (2.10.3) 1 | sigplus (1.5.0.284) 1 | K2 Comments (2.10.3) 1 | News Show Pro GK5 (2.0.1) 1 | K2 Tools (2.10.3) 1 | K2 Users (2.10.3) 1 | Smart Slider 3 Module (3.4.1.14) 1 |

Modules :: Admin ::
Core :: mod_latestactions (3.9.0) 1 | mod_logged (3.0.0) 1 | mod_popular (3.0.0) 1 | mod_status (3.0.0) 1 | mod_submenu (3.0.0) 1 | mod_stats_admin (3.0.0) 1 | mod_title (3.0.0) 1 | mod_custom (3.0.0) 1 | mod_privacy_dashboard (3.9.0) 1 | mod_quickicon (3.0.0) 1 | mod_toolbar (3.0.0) 1 | mod_menu (3.0.0) 1 | mod_version (3.0.0) 1 | mod_login (3.0.0) 1 | mod_sampledata (3.8.0) 1 | mod_multilangstatus (3.0.0) 1 | mod_latest (3.0.0) 1 | mod_feed (3.0.0) 1 |
3rd Party:: K2 Quick Icons (admin) (2.10.3) 1 | K2 Stats (admin) (2.10.3) 1 |

Libraries ::
Core ::
3rd Party:: file_fof30 (3.7.0) ? |

Plugins ::
Core :: PLG_INSTALLER_FOLDERINSTALLER (3.6.0) 1 | plg_installer_packageinstaller (3.6.0) 1 | PLG_INSTALLER_URLINSTALLER (3.6.0) 1 | plg_installer_webinstaller (2.1.2) 1 | plg_fields_imagelist (3.7.0) 1 | plg_fields_textarea (3.7.0) 1 | plg_fields_media (3.7.0) 1 | plg_fields_repeatable (3.9.0) 1 | plg_fields_user (3.7.0) 1 | plg_fields_calendar (3.7.0) 1 | plg_fields_usergrouplist (3.7.0) 1 | plg_fields_editor (3.7.0) 1 | plg_fields_radio (3.7.0) 1 | plg_fields_integer (3.7.0) 1 | plg_fields_text (3.7.0) 1 | plg_fields_checkboxes (3.7.0) 1 | plg_fields_sql (3.7.0) 1 | plg_fields_list (3.7.0) 1 | plg_fields_url (3.7.0) 1 | plg_fields_color (3.7.0) 1 | plg_extension_joomla (3.0.0) 1 | plg_captcha_recaptcha (3.4.0) 0 | plg_captcha_recaptcha_invisible (3.8) 0 | PLG_ACTIONLOG_JOOMLA (3.9.0) 1 | plg_user_profile (3.0.0) 0 | plg_user_contactcreator (3.0.0) 0 | plg_user_terms (3.9.0) 0 | plg_user_joomla (3.0.0) 1 | plg_content_fields (3.7.0) 1 | plg_content_pagenavigation (3.0.0) 1 | plg_content_emailcloak (3.0.0) 1 | plg_content_confirmconsent (3.9.0) 0 | plg_content_joomla (3.0.0) 1 | plg_content_finder (3.0.0) 0 | plg_content_pagebreak (3.0.0) 1 | plg_content_vote (3.0.0) 1 | plg_content_loadmodule (3.0.0) 1 | plg_privacy_actionlogs (3.9.0) 1 | plg_privacy_user (3.9.0) 1 | plg_privacy_content (3.9.0) 1 | plg_privacy_message (3.9.0) 1 | plg_privacy_consents (3.9.0) 1 | plg_twofactorauth_yubikey (3.2.0) 0 | plg_twofactorauth_totp (3.2.0) 0 | PLG_SYSTEM_ACTIONLOGS (3.9.0) 0 | plg_system_languagecode (3.0.0) 0 | plg_system_highlight (3.0.0) 1 | plg_system_redirect (3.0.0) 0 | plg_system_fields (3.7.0) 1 | plg_system_updatenotification (3.5.0) 0 | plg_system_logrotation (3.9.0) 1 | plg_system_stats (3.5.0) 1 | plg_system_logout (3.0.0) 1 | plg_system_remember (3.0.0) 1 | plg_system_sef (3.0.0) 1 | plg_system_log (3.0.0) 1 | plg_system_languagefilter (3.0.0) 0 | plg_system_privacyconsent (3.9.0) 0 | plg_system_cache (3.0.0) 0 | plg_system_debug (3.0.0) 1 | plg_system_sessiongc (3.8.6) 1 | plg_system_p3p (3.0.0) 0 | plg_authentication_ldap (3.0.0) 0 | plg_authentication_joomla (3.0.0) 1 | plg_authentication_gmail (3.0.0) 0 | plg_authentication_cookie (3.0.0) 0 | plg_finder_newsfeeds (3.0.0) 1 | plg_finder_tags (3.0.0) 1 | plg_finder_contacts (3.0.0) 1 | plg_finder_content (3.0.0) 1 | plg_finder_categories (3.0.0) 1 | plg_quickicon_privacycheck (3.9.0) 1 | plg_quickicon_joomlaupdate (3.0.0) 1 | plg_quickicon_extensionupdate (3.0.0) 1 | plg_quickicon_phpversioncheck (3.7.0) 1 | plg_search_newsfeeds (3.0.0) 1 | plg_search_tags (3.0.0) 1 | plg_search_contacts (3.0.0) 1 | plg_search_content (3.0.0) 1 | plg_search_categories (3.0.0) 1 | plg_editors-xtd_readmore (3.0.0) 1 | plg_editors-xtd_fields (3.7.0) 1 | plg_editors-xtd_article (3.0.0) 1 | plg_editors-xtd_image (3.0.0) 1 | plg_editors-xtd_menu (3.7.0) 1 | plg_editors-xtd_pagebreak (3.0.0) 1 | plg_editors-xtd_module (3.5.0) 1 |
3rd Party:: plg_editors_tinymce (4.5.12) 1 | plg_editors_codemirror (5.56.0) 0 | Smart Slider 3 Updater Plugin (3.4.1.14) 1 | Josetta - K2 Items (2.6.9) 1 | Josetta - K2 Categories (2.6.9) 1 | PLG_ACTIONLOG_AKEEBABACKUP (7.4.0.1) 0 | User - K2 (2.10.3) 1 | User - Profile - SecSignID (1.4.1) 0 | plg_content_sigplus (1.5.0.284) 1 | PLG_SYSTEM_BACKUPONUPDATE (7.4.0.1) 0 | System - Add Print Stylesheet (1.1) 0 | System - K2 (2.10.3) 1 | System - Mobile Menu CK (1.2.7) 1 | Smart Slider 3 System Plugin (3.4.1.14) 1 | Consent Manager CMP (consentmanager (1.0.0) ? | plg_finder_k2 (2.10.3) 0 | plg_quickicon_akeebabackup (7.4.0.1) 1 | Search - K2 (2.10.3) 1 | plg_search_sigplus (1.5.0.284) 1 | plg_editors-xtd_sigplus (1.5.0.284) 1 |
Templates Discovered :: wrote:
Templates :: Site :: jpss (1.0) 1 | protostar (1.0) 1 | buckle (2.2.3) 1 | beez3 (3.1.0) 1 |
Templates :: Admin :: wisadmin (1.1) 1 | hathor (3.0.0) 1 | isis (1.0) 1 |