Cannot login to Joomla backend Topic is solved

[nagios786]

I recently upgraded my Joomla site to version 4.4.9. However, when I enable debug mode, I get logged out of the Joomla backend and cannot log back in. Every time I attempt to log in, the page simply refreshes without any action.

I have looked through the Joomla forum and tried various suggested solutions, but none have worked for me.

Could someone please guide me on what might be causing this issue?

[nagios786]

Joomla! Instance :: Joomla! 4.4.9-Stable (Pamoja) 15-October-2024
Joomla! Configured :: Yes | Read-Only (444) |
Configuration Options :: Offline: false | SEF: true | SEF Suffix: true | SEF ReWrite: true | .htaccess/web.config: Yes | GZip: false | Cache: false | CacheTime: 15 | CacheHandler: file | CachePlatformPrefix: false | FTP Layer: N/A | Proxy: false | LiveSite: | Session lifetime: 30 | Session handler: memcached | Shared sessions: false | SSL: 0 | Error Reporting: default | Site Debug: true | Language Debug: false | Default Access: Public | Unicode Slugs: false | dbConnection Type: mysqli | PHP Supports J! 4.4.9: Yes | Database Supports J! 4.4.9: Yes | Database Credentials Present: Yes |

Host Configuration :: OS: Linux | OS Version: 6.6.41-MCIclouder486-c9 | Technology: x86_64 | Web Server: Apache | Encoding: | System TMP Writable: Yes | Free Disk Space : 16.08 GiB |

PHP Configuration :: Version: 8.0.30 | PHP API: apache2handler | Session Path Writable: Yes | Display Errors: 0 | Error Reporting: 30709 | Log Errors To: php_errorlog | Last Known Error: | Register Globals: | Magic Quotes: | Safe Mode: | Allow url fopen: 1 | Open Base: | Uploads: 1 | Max. Upload Size: 256M | Max. POST Size: 256M | Max. Input Time: 120 | Max. Execution Time: 120 | Memory Limit: 768M

Database Configuration :: Version: 8.0.36-28 (Client:mysqlnd 8.0.30) | Database Size: 63.95 MiB | #of Tables with config prefix:  209 | #of other Tables:  0 | User Privileges : GRANT ALL

PHP Extensions :: Core (8.0.30) | date (8.0.30) | libxml (8.0.30) | openssl (8.0.30) | pcre (8.0.30) | sqlite3 (8.0.30) | zlib (8.0.30) | bcmath (8.0.30) | bz2 (8.0.30) | calendar (8.0.30) | ctype (8.0.30) | curl (8.0.30) | dba (8.0.30) | dom (20031129) | enchant (8.0.30) | hash (8.0.30) | fileinfo (8.0.30) | filter (8.0.30) | ftp (8.0.30) | gd (8.0.30) | gettext (8.0.30) | gmp (8.0.30) | SPL (8.0.30) | iconv (8.0.30) | session (8.0.30) | intl (8.0.30) | json (8.0.30) | mbstring (8.0.30) | standard (8.0.30) | mysqlnd (mysqlnd 8.0.30) | mysqli (8.0.30) | PDO (8.0.30) | pdo_mysql (8.0.30) | pdo_pgsql (8.0.30) | pdo_sqlite (8.0.30) | pgsql (8.0.30) | Phar (8.0.30) | posix (8.0.30) | pspell (8.0.30) | Reflection (8.0.30) | imap (8.0.30) | shmop (8.0.30) | SimpleXML (8.0.30) | soap (8.0.30) | sockets (8.0.30) | sodium (8.0.30) | exif (8.0.30) | sysvmsg (8.0.30) | sysvsem (8.0.30) | tidy (8.0.30) | tokenizer (8.0.30) | xml (8.0.30) | xmlreader (8.0.30) | xmlwriter (8.0.30) | xsl (8.0.30) | zip (1.19.5) | apache2handler (8.0.30) | memcached (3.2.0) | Zend OPcache (8.0.30) | Zend Engine (4.0.30-dev) |
Potential Missing Extensions ::

Switch User Environment :: PHP CGI: No | Server SU: No | PHP SU: No | Potential Ownership Issues: No

Apache Modules :: core | mod_authn_file | mod_authn_core | mod_authz_host | mod_authz_groupfile | mod_authz_user | mod_authz_core | mod_access_compat | mod_auth_basic | mod_so | mod_watchdog | mod_include | mod_substitute | mod_deflate | http_core | mod_mime | mod_log_config | mod_env | mod_mime_magic | mod_expires | mod_headers | mod_unique_id | mod_setenvif | mod_version | mod_slotmem_shm | event | mod_unixd | mod_autoindex | mod_cgi | mod_dir | mod_userdir | mod_alias | mod_rewrite | mod_php | mod_dtimeout | mod_filter | mod_robots | mod_rpaf | mod_simpleupdate | mod_backtrace | mod_whatkilledus | mod_idleshutdown | Apache |
Potential Missing Modules :: mod_ssl |

Core Folders :: images/ (755) | components/ (755) | modules/ (755) | plugins/ (755) | language/ (755) | templates/ (755) | cache/ (755) | logs/ (---) | tmp/ (755) | administrator/components/ (755) | administrator/modules/ (755) | administrator/language/ (755) | administrator/templates/ (755) | administrator/logs/ (755) | api/ (755) |

Elevated Permissions (First 10) ::

Database statistics :: Uptime: 4655260 | Threads: 3 | Questions: 2125005443 | Slow queries: 141 | Opens: 7949767 | Flush tables: 3 | Open tables: 3072 | Queries per second avg: 456.474 |

Components :: Site ::
Core ::
3rd Party::

Components :: Admin ::
Core :: com_checkin (4.0.0) 1 | com_joomlaupdate (4.0.3) 1 | com_banners (4.0.0) 1 | com_cpanel (4.0.0) 1 | com_finder (4.0.0) 1 | com_modules (4.0.0) 1 | com_menus (4.0.0) 1 | com_associations (4.0.0) 1 | com_tags (4.0.0) 1 | com_installer (4.0.0) 1 | com_users (4.0.0) 1 | com_messages (4.0.0) 1 | com_contenthistory (4.0.0) 1 | com_wrapper (4.0.0) 1 | com_postinstall (4.0.0) 1 | com_actionlogs (3.9.0) 1 | com_fields (4.0.0) 1 | com_scheduler (4.1.0) 1 | com_languages (4.0.0) 1 | com_ajax (4.0.0) 1 | com_mails (4.0.0) 1 | com_guidedtours (4.3.0) 1 | com_plugins (4.0.0) 1 | com_content (4.0.0) 1 | com_cache (4.0.0) 1 | com_redirect (4.0.0) 1 | com_media (3.0.0) 1 | com_config (4.0.0) 1 | com_search (3.0.0) 1 | com_workflow (4.0.0) 1 | com_categories (4.0.0) 1 | com_admin (4.0.0) 1 | com_privacy (3.9.0) 1 | com_newsfeeds (4.0.0) 1 | com_login (4.0.0) 1 | com_templates (4.0.0) 1 |
3rd Party:: tcpdf (1.2.12) 1 | com_akeebabackup (9.9.10) 1 | COM_ADVANCEDMODULES (9.9.0PRO) 1 | COM_CUSTOMFILTERS (2.16.0) 1 | com_vmuikitx (10.39) 1 | JSpeed (2.6) 0 | VirtueMart_allinone (-) 1 | com_jp_megamenu (1.11) 0 | ECB Currency Converter (1.0) ? | VIRTUEMART (-) 1 | GSD (1.0) 1 | JMap (4.18.10) 1 | com_sagepayrecords (3.4) ? | Admintools (6.2.1) 0 | COM_CSVI (8.12.1) 1 |

Modules :: Site ::
Core :: mod_search (3.0.0) 1 | mod_stats (3.0.0) 1 | mod_footer (3.0.0) 1 | mod_users_latest (3.0.0) 1 | mod_articles_latest (3.0.0) 1 | mod_tags_similar (3.1.0) 1 | mod_finder (3.0.0) 1 | mod_random_image (3.0.0) 1 | mod_articles_news (3.0.0) 1 | mod_feed (3.0.0) 1 | mod_wrapper (3.0.0) 1 | mod_languages (3.5.0) 1 | mod_syndicate (3.0.0) 1 | mod_whosonline (3.0.0) 1 | mod_related_items (3.0.0) 1 | mod_banners (3.0.0) 1 | mod_tags_popular (3.1.0) 1 | mod_custom (3.0.0) 1 | mod_articles_popular (3.0.0) 1 | mod_login (3.0.0) 1 | mod_articles_categories (3.0.0) 1 | mod_articles_category (3.0.0) 1 | mod_articles_archive (3.0.0) 1 | mod_breadcrumbs (3.0.0) 1 | mod_menu (3.0.0) 1 |
3rd Party:: mod_virtuemart_manufacturer (4.0.23) 1 | mod_virtuemart_languages (4.0.23) ? | mod_virtuemart_vendor (4.0.23) ? | mod_cf_breadcrumbs (2.16.0) 0 | JSitemap module (4.18.10) 1 | JP Menu (1.11) 1 | mod_virtuemart_product (4.0.23) 1 | mod_cf_filtering (2.16.0) 1 | mod_virtuemart_currencies (4.0.23) 1 | mod_virtuemart_cart (4.0.23) 1 | MOD_YOOTHEME_BUILDER (4.4.10) 1 | mod_cf_search (2.16.0) 1 | mod_virtuemart_category (4.0.23) 1 | Simple SagePay (3.4) ? | mod_virtuemart_search (4.0.23) 1 |

Modules :: Admin ::
Core :: mod_logged (3.0.0) 1 | mod_stats_admin (3.0.0) 1 | mod_multilangstatus (3.0.0) 1 | mod_privacy_status (4.0.0) 1 | mod_loginsupport (4.0.0) 1 | mod_latest (3.0.0) 1 | mod_title (3.0.0) 1 | mod_popular (3.0.0) 1 | mod_version (3.0.0) 1 | mod_guidedtours (4.3.0) 1 | mod_frontend (4.0.0) 1 | mod_toolbar (3.0.0) 1 | mod_feed (3.0.0) 1 | mod_user (4.0.0) 1 | mod_privacy_dashboard (3.9.0) 1 | mod_messages (4.0.0) 1 | mod_sampledata (3.8.0) 1 | mod_submenu (3.0.0) 1 | mod_post_installation_messages (4.0.0) 1 | mod_latestactions (3.9.0) 1 | mod_custom (3.0.0) 1 | mod_login (3.0.0) 1 | mod_quickicon (3.0.0) 1 | mod_menu (3.0.0) 1 |
3rd Party:: JSitemap (4.18.10) 1 | JSpeed Panel (2.6) 0 | VirtueMart Administrator Menu (4.2.18) ? | MOD_YOOTHEME_LINK (4.4.10) 1 |

Libraries ::
Core ::
3rd Party:: Regular Labs Library (23.9.3039) 1 | Free Mono (-) ? | Helvetica (-) ? | file_fof40 (4.1.3) ? |

Plugins ::
Core :: plg_quickicon_eos (4.4.0) 1 | plg_quickicon_overridecheck (4.0.0) 1 | plg_quickicon_joomlaupdate (3.0.0) 1 | plg_quickicon_privacycheck (3.9.0) 1 | plg_quickicon_phpversioncheck (3.7.0) 1 | plg_quickicon_downloadkey (4.0.0) 1 | plg_quickicon_extensionupdate (3.0.0) 1 | plg_actionlog_joomla (3.9.0) 1 | plg_search_contacts (3.0.0) 1 | plg_search_newsfeeds (3.0.0) 1 | plg_search_categories (3.0.0) 1 | plg_search_content (3.0.0) 1 | plg_search_tags (3.0.0) 1 | plg_multifactorauth_totp (3.2.0) 0 | plg_multifactorauth_email (4.2.0) 0 | plg_multifactorauth_yubikey (3.2.0) 0 | plg_multifactorauth_fixed (4.2.0) 0 | plg_multifactorauth_webauthn (4.2.0) 0 | plg_behaviour_versionable (4.0.0) 1 | plg_behaviour_taggable (4.0.0) 1 | plg_behaviour_compat (4.4.0) 1 | plg_content_vote (3.0.0) 0 | plg_content_joomla (3.0.0) 1 | plg_content_loadmodule (3.0.0) 1 | plg_content_fields (3.7.0) 1 | plg_content_pagebreak (3.0.0) 1 | plg_content_confirmconsent (3.9.0) 0 | plg_content_pagenavigation (3.0.0) 1 | plg_content_finder (3.0.0) 0 | plg_content_emailcloak (3.0.0) 1 | plg_workflow_featuring (4.0.0) 1 | plg_workflow_notification (4.0.0) 1 | plg_workflow_publishing (4.0.0) 1 | plg_webservices_plugins (4.0.0) 1 | plg_webservices_newsfeeds (4.0.0) 1 | plg_webservices_messages (4.0.0) 1 | plg_webservices_config (4.0.0) 1 | plg_webservices_menus (4.0.0) 1 | plg_webservices_content (4.0.0) 1 | plg_webservices_privacy (4.0.0) 1 | plg_webservices_languages (4.0.0) 1 | plg_webservices_tags (4.0.0) 1 | plg_webservices_users (4.0.0) 1 | plg_webservices_templates (4.0.0) 1 | plg_webservices_redirect (4.0.0) 1 | plg_webservices_media (4.1.0) 1 | plg_webservices_banners (4.0.0) 1 | plg_webservices_installer (4.0.0) 1 | plg_webservices_modules (4.0.0) 1 | plg_api-authentication_token (4.0.0) 1 | plg_api-authentication_basic (4.0.0) 0 | plg_privacy_content (3.9.0) 1 | plg_privacy_message (3.9.0) 1 | plg_privacy_consents (3.9.0) 1 | plg_privacy_user (3.9.0) 1 | plg_privacy_actionlogs (3.9.0) 1 | plg_extension_joomla (3.0.0) 1 | plg_extension_namespacemap (4.0.0) 1 | plg_extension_finder (4.0.0) 1 | plg_captcha_recaptcha_invisible (3.8) 0 | plg_captcha_recaptcha (3.4.0) 0 | plg_media-action_rotate (4.0.0) 1 | plg_media-action_crop (4.0.0) 1 | plg_media-action_resize (4.0.0) 1 | plg_system_sef (3.0.0) 1 | plg_system_jooa11y (4.2.0) 1 | plg_system_cache (3.0.0) 0 | plg_system_languagecode (3.0.0) 0 | plg_system_stats (3.5.0) 1 | plg_system_guidedtours (4.3.0) 1 | plg_system_privacyconsent (3.9.0) 0 | plg_system_debug (3.0.0) 1 | plg_system_task_notification (4.1) 1 | plg_system_log (3.0.0) 1 | plg_system_skipto (4.0.0) 1 | plg_system_sessiongc (3.8.6) 1 | plg_system_remember (3.0.0) 1 | plg_system_logrotation (3.9.0) 1 | plg_system_httpheaders (4.0.0) 0 | plg_system_fields (3.7.0) 1 | plg_system_highlight (3.0.0) 1 | plg_system_updatenotification (3.5.0) 1 | plg_system_actionlogs (3.9.0) 1 | plg_system_redirect (3.0.0) 0 | plg_system_schedulerunner (4.1) 1 | plg_system_accessibility (4.0.0) 0 | plg_system_logout (3.0.0) 1 | plg_system_webauthn (4.0.0) 1 | plg_system_languagefilter (3.0.0) 0 | plg_system_shortcut (4.2.0) 1 | plg_fields_imagelist (3.7.0) 1 | plg_fields_list (3.7.0) 1 | plg_fields_integer (3.7.0) 1 | plg_fields_subform (4.0.0) 1 | plg_fields_usergrouplist (3.7.0) 1 | plg_fields_editor (3.7.0) 1 | plg_fields_calendar (3.7.0) 1 | plg_fields_user (3.7.0) 1 | plg_fields_text (3.7.0) 1 | plg_fields_textarea (3.7.0) 1 | plg_fields_radio (3.7.0) 1 | plg_fields_media (3.7.0) 1 | plg_fields_color (3.7.0) 1 | plg_fields_checkboxes (3.7.0) 1 | plg_fields_url (3.7.0) 1 | plg_fields_sql (3.7.0) 1 | plg_task_requests (4.1) 1 | plg_task_site_status (4.1) 1 | plg_task_demo_tasks (4.1) 1 | plg_task_check_files (4.1) 1 | plg_user_profile (3.0.0) 0 | plg_user_joomla (3.0.0) 1 | plg_user_token (3.9.0) 1 | plg_user_terms (3.9.0) 0 | plg_user_contactcreator (3.0.0) 0 | plg_editors-xtd_menu (3.7.0) 1 | plg_editors-xtd_image (3.0.0) 1 | plg_editors-xtd_module (3.5.0) 1 | plg_editors-xtd_fields (3.7.0) 1 | plg_editors-xtd_article (3.0.0) 1 | plg_editors-xtd_pagebreak (3.0.0) 1 | plg_editors-xtd_readmore (3.0.0) 1 | plg_authentication_joomla (3.0.0) 1 | plg_authentication_cookie (3.0.0) 1 | plg_authentication_ldap (3.0.0) 0 | plg_installer_folderinstaller (3.6.0) 1 | plg_installer_override (4.0.0) 1 | plg_installer_webinstaller (4.0.0) 1 | plg_installer_urlinstaller (3.6.0) 1 | plg_installer_packageinstaller (3.6.0) 1 | plg_sampledata_multilang (4.0.0) 1 | plg_filesystem_local (4.0.0) 1 | plg_finder_contacts (3.0.0) 1 | plg_finder_newsfeeds (3.0.0) 1 | plg_finder_categories (3.0.0) 1 | plg_finder_content (3.0.0) 1 | plg_finder_tags (3.0.0) 1 |
3rd Party:: PLG_QUICKICON_AKEEBABACKUP (9.9.10) 1 | PLG_ACTIONLOG_ADVANCEDMODULES (9.9.0PRO) 0 | PLG_ACTIONLOG_ADMINTOOLS (6.2.1) 0 | PLG_CONSOLE_ROCSVI (<version>8.12) 0 | Stockable Customfields (1.8.0) 1 | VMCustom - textinput (4.2.18) ? | VM - Custom, Virtuemart Simple Down (${PHING.VERSI) ? | plgvm_specification (4.2.18) ? | PLG_CSVIADDON_VIRTUEMART_TITLE (8.12.1) 1 | PLG_CSVIADDON_CUSTOMFILTERS_TITLE (8.12.1) 1 | PLG_CSVIADDON_MENUS_TITLE (8.12.1) 1 | PLG_CSVIADDON_CATEGORIES_TITLE (8.12.1) 1 | PLG_CSVIADDON_CONTENT_TITLE (8.12.1) 1 | PLG_CSVIADDON_CSVI_TITLE (8.12.1) 1 | PLG_CSVIADDON_TAGS_TITLE (8.12.1) 1 | PLG_CSVIADDON_USERS_TITLE (8.12.1) 1 | PLG_CSVIADDON_FIELDS_TITLE (8.12.1) 1 | PLG_CSVIADDON_MODULES_TITLE (8.12.1) 1 | Search - VirtueMart (4.2.18) ? | VM - Calculation Avalara Tax (4.2.18) ? | PLG_GSD_JREVIEWS (1.0) 0 | PLG_GSD_RSBLOG (1.0) 0 | PLG_GSD_SPPAGEBUILDER (1.0) 0 | PLG_GSD_J2STORE (1.0) 0 | PLG_GSD_RSEVENTSPRO (1.0) 0 | PLG_GSD_DJEVENTS (1.0) 0 | PLG_GSD_JCALPRO (1.0) 0 | PLG_GSD_VIRTUEMART (1.0) 1 | PLG_GSD_MENUS (1.0) 0 | PLG_GSD_HIKASHOP (1.0) 0 | PLG_GSD_JSHOPPING (1.0) 0 | PLG_GSD_CONTENT (1.0) 1 | PLG_GSD_JBUSINESSDIRECTORY (1.0) 0 | PLG_GSD_EVENTBOOKING (1.0) 0 | PLG_GSD_EASYBLOG (1.0) 0 | PLG_GSD_DJCATALOG2 (1.0) 0 | PLG_GSD_QUIX (1.0) 0 | PLG_GSD_K2 (1.0) 0 | PLG_GSD_ICAGENDA (1.0) 0 | PLG_GSD_DJCLASSIFIEDS (1.0) 0 | PLG_GSD_ZOO (1.0) 0 | PLG_GSD_DPCALENDAR (1.0) 0 | PLG_GSD_SOBIPRO (1.0) 0 | PLG_GSD_ESHOP (1.0) 0 | PLG_GSD_GRIDBOX (1.0) 0 | PLG_GSD_JEVENTS (1.0) 0 | plg_editors_codemirror (5.65.15) 1 | plg_editors_tinymce (5.10.9) 1 | Content - JSitemap Pingomatic (4.18.10) 1 | VMuikit Shortcode Plugin (10.39) 1 | Realex_hpp_api (4.2.18) ? | eway (3.8.8) 0 | PLG_CSVIEXT_ARTICLES_TITLE (8.12.1) 1 | PLG_CSVIEXT_PARAM_TITLE (8.12.1) 1 | PLG_CSVIEXT_TEXTINPUT_TITLE (8.12.1) 1 | PLG_CSVIEXT_JOOMLACUSTOMFIELDS_TITL (8.12.1) ? | PLG_CSVIEXT_CUSTOMFIELDSFORALL_TITL (8.12.1) ? | PLG_CSVIEXT_PRODUCTCARTVARIANT_TITL (8.12.1) ? | By weight, ZIP and countries (4.2.18) ? | OTSHIPMENT_RULES_ADV (6.2.4) ? | PLG_SYSTEM_VMLOADERPLUGINUPDATE (4.2.18) ? | PLG_SYSTEM_REGULARLABS (23.9.3039) 0 | VMuikitx Override (10.39) 1 | plg_system_virtuemart (1.0.0) 0 | SmartCms Export Orders (1.0) 0 | PLG_SYSTEM_ROLANDD_TITLE (8.12.1) 1 | plg_system_nrframework (5.0.47) 1 | JP Mega Menu (1.11) 0 | plg_system_gsd (5.6.5) 1 | System - Essentials YOOtheme Pro (2.2.19) 1 | plg_vm_route (2.5.0) ? | PLG_SYSTEM_ADVANCEDMODULES (9.9.0PRO) 0 | Breakdesigns AJAX (1.0) 1 | PLG_SYSTEM_OFFICIALFACEBOOKPIXEL (1.0.3) 0 | System - JSitemap utilities (4.18.10) 1 | System - JSpeed (2.6) 1 | PLG_SYSTEM_ADMINTOOLS (6.2.1) 0 | VMuikitx One Page Checkout (10.39) 1 | System - YOOtheme Framework (4.4.10) 1 | AMAZON (4.2.4) ? | Fields - YOOtheme Location (4.4.10) 1 | PayPal Checkout (4.2.18) 0 | 2Checkout (4.2.18) ? | PayPal (deprecated, please use PayP (4.2.18) ? | VM Payment - Paybox System 3D V2 (4.2.18) ? | VM - Payment, SagePay (3.0) 0 | Authorize.net AIM (4.2.18) ? | Skrill (4.2.18) ? | Heidelpay (16.11.07) ? | realex_hpp_api (4.0.0) ? | VM Payment - klikandpay (4.2.18) ? | VM Payment - eway (4.2.18) ? | Standard (4.2.18) ? | Sofort Ideal (4.2.18) ? | AMAZON (4.2.4) ? | Sofort (4.2.18) ? | Installer - Daycounts (4.1.0) 0 | PLG_INSTALLER_ZOOLANDERS (1.0.2) 0 | PLG_INSTALLER_ADMINTOOLS (6.2.1) 0 | Installer - YOOtheme (1.0.7) 1 | RO CSVI Find And Skip (8.12.1) 0 | RO CSVI Field Copy (8.12.1) 0 | RO CSVI Mulitple Replace (8.12.1) 0 | RO CSVI Margin (8.12.1) 0 | RO CSVI Conditional (8.12.1) 0 | RO CSVI Field Combine (8.12.1) 1 |

Templates :: Site :: vmbasic (1.0.0) 1 | vmbeez3 (3.4.2) 0 | cassiopeia (1.0) 1 | vmstore (1.0.0) 0 | YOOtheme (4.4.10) 1 |
Templates :: Admin :: vmadmin (4.2.18) 1 | atum (1.0) 1 |

[Webdongle]

Have you used Admintools to password protect admin?

[nagios786]

Thansk Webdongle for the response.
No I didn't use Admintools to password protect admin.

[nagios786]

Do I need to remove admin tools?

[Webdongle]

You could rename the admin tools folder to see if it made a difference?
But I would check the .htaccess file.
What did you do last time you logged in?

[nagios786]

I disabled the admin tools folder but the login issue still exist.
I just enabled the debug mode and got this issue.
I have restored an old backup but when I activate the debug mode I get logged out and cannot log back in.
I got this message in log

assets - No asset found for com_modules.module.156, falling back to com_modules

[gws]

When you restored the back up did you empty the joomla root of all files and empty the database? If not , that is what you must do to restore a backup.

[Per Yngve Berg]

Session handler: memcached

Try changing it to "filesystem" in configuration.php

[nagios786]

Thank you everyone.
The issue is solved.

[Webdongle]

How?

[nagios786]

I changed Session handler: to "filesystem" in configuration.php