0 Class 'JParameter' not found Topic is solved

[deandre81]

Hello,
I am receiving:
"An error has occurred.
0 Class 'JParameter' not found"
This happened after upgrading from joomla 3 to 4
After searching, i see that i should use the forum assistant so here is what i got from it

Joomla! Instance :: Joomla! 4.1.3-Stable (Kuamini) 10-May-2022
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: true | CacheTime: 15 | CacheHandler: file | CachePlatformPrefix: false | FTP Layer: false | Proxy: false | LiveSite: | Session lifetime: 20 | Session handler: database | Shared sessions: false | SSL: 2 | Error Reporting: Development | Site Debug: false | Language Debug: false | Default Access: Public | Unicode Slugs: false | dbConnection Type: mysqli | PHP Supports J! 4.1.3: Yes | Database Supports J! 4.1.3: Yes | Database Credentials Present: Yes |

Host Configuration :: OS: Linux | OS Version: 4.18.0-348.7.1.lve.el7h.x86_64 | Technology: x86_64 | Web Server: LiteSpeed | Encoding: gzip | System TMP Writable: Yes | Free Disk Space : 1274.04 GiB |

PHP Configuration :: Version: 7.4.29 | PHP API: litespeed | Session Path Writable: Yes | Display Errors: 0 | Error Reporting: 32759 | Log Errors To: error_log | Last Known Error: | Register Globals: | Magic Quotes: | Safe Mode: | Allow url fopen: 1 | Open Base: | Uploads: 1 | Max. Upload Size: 50M | Max. POST Size: 80M | Max. Input Time: 60 | Max. Execution Time: 30 | Memory Limit: 256M

Database Configuration :: Version: 5.7.37-cll-lve (Client:mysqlnd 7.4.29) | Database Size: 16.61 MiB | #of Tables with config prefix:  299 | #of other Tables:  0 | User Privileges : GRANT ALL

PHP Extensions :: Core (7.4.29) | date (7.4.29) | libxml (7.4.29) | openssl (7.4.29) | pcre (7.4.29) | zlib (7.4.29) | filter (7.4.29) | hash (7.4.29) | Reflection (7.4.29) | SPL (7.4.29) | session (7.4.29) | standard (7.4.29) | litespeed () | bcmath (7.4.29) | bz2 (7.4.29) | calendar (7.4.29) | ctype (7.4.29) | curl (7.4.29) | dba (7.4.29) | dom (20031129) | enchant (7.4.29) | mbstring (7.4.29) | fileinfo (7.4.29) | ftp (7.4.29) | gd (7.4.29) | gettext (7.4.29) | iconv (7.4.29) | imap (7.4.29) | intl (7.4.29) | json (7.4.29) | ldap (7.4.29) | exif (7.4.29) | mysqlnd (mysqlnd 7.4.29) | odbc (7.4.29) | PDO (7.4.29) | pgsql (7.4.29) | Phar (7.4.29) | posix (7.4.29) | pspell (7.4.29) | shmop (7.4.29) | SimpleXML (7.4.29) | snmp (7.4.29) | soap (7.4.29) | sockets (7.4.29) | sqlite3 (7.4.29) | sysvmsg (7.4.29) | sysvsem (7.4.29) | sysvshm (7.4.29) | tokenizer (7.4.29) | xml (7.4.29) | xmlwriter (7.4.29) | xsl (7.4.29) | zip (1.15.6) | mysqli (7.4.29) | pdo_mysql (7.4.29) | PDO_ODBC (7.4.29) | pdo_pgsql (7.4.29) | pdo_sqlite (7.4.29) | xmlreader (7.4.29) | xmlrpc (7.4.29) | redis (5.3.2) | i360 (6.2.2) | memcached (3.1.5) | ionCube Loader (10.4.5) | Zend OPcache (7.4.29) | Zend Engine (3.4.0) |
Potential Missing Extensions ::

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

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/ (755) |

Elevated Permissions (First 10) ::

Database statistics :: Uptime: 575765 | Threads: 11 | Questions: 1113137414 | Slow queries: 0 | Opens: 46678055 | Flush tables: 1 | Open tables: 3992 | Queries per second avg: 1933.318 |

Components :: Site ::
Core ::
3rd Party:: WF_WORDCOUNT_TITLE (2.9.22) ? | WF_NONBREAKING_TITLE (2.9.22) ? | WF_FONTSIZESELECT_TITLE (2.9.22) ? | WF_XHTMLXTRAS_TITLE (2.9.22) ? | WF_VISUALCHARS_TITLE (2.9.22) ? | WF_CLIPBOARD_TITLE (2.9.22) ? | WF_ATTRIBUTES_TITLE (2.9.11) ? | WF_MEDIA_TITLE (2.9.22) ? | WF_FONTSELECT_TITLE (2.9.22) ? | WF_DIRECTIONALITY_TITLE (2.9.22) ? | WF_SOURCE_TITLE (2.9.22) ? | WF_REFERENCE_TITLE (2.9.11) ? | WF_TEXTCASE_TITLE (2.9.22) ? | WF_FORMATSELECT_TITLE (2.9.22) ? | WF_HR_TITLE (2.9.22) ? | WF_FULLSCREEN_TITLE (2.9.22) ? | WF_PREVIEW_TITLE (2.9.22) ? | WF_HELP_TITLE (2.9.22) ? | WF_BROWSER_TITLE (2.9.22) ? | WF_STYLESELECT_TITLE (2.9.22) ? | WF_LINK_TITLE (2.9.22) ? | WF_CLEANUP_TITLE (2.9.22) ? | WF_FONTCOLOR_TITLE (2.9.22) ? | WF_IMGMANAGER_TITLE (2.9.22) ? | WF_SPELLCHECKER_TITLE (2.9.22) ? | WF_VISUALBLOCKS_TITLE (2.9.22) ? | WF_PRINT_TITLE (2.9.22) ? | WF_KITCHENSINK_TITLE (2.9.22) ? | JCE - Noneditable (1.0.0) ? | WF_CHARMAP_TITLE (2.9.22) ? | WF_EMOTIONS_TITLE (2.9.22) ? | WF_ANCHOR_TITLE (2.9.22) ? | WF_TABLE_TITLE (2.9.22) ? | WF_LAYER_TITLE (2.6.38) ? | WF_AUTOSAVE_TITLE (2.9.22) ? | WF_ARTICLE_TITLE (2.9.22) ? | WF_SEARCHREPLACE_TITLE (2.9.22) ? | WF_STYLE_TITLE (2.9.22) ? | WF_CONTEXTMENU_TITLE (2.9.22) ? | WF_LISTS_TITLE (2.9.22) ? | WF_FILESYSTEM_JOOMLA_TITLE (2.9.22) ? | WF_LINKS_JOOMLALINKS_TITLE (2.9.22) ? | WF_LINK_SEARCH_TITLE (2.9.22) ? | WF_AGGREGATOR_[youtube]_TITLE (2.9.22) ? | WF_AGGREGATOR_AUDIO_TITLE (2.9.22) ? | WF_AGGREGATOR_GOOGLEMAPS_TITLE (2.3.4.3) ? | WF_AGGREGATOR_DAILYMOTION_TITLE (2.9.22) ? | WF_AGGREGATOR_VIMEO_TITLE (2.9.22) ? | WF_AGGREGATOR_VIDEO_TITLE (2.9.22) ? | WF_POPUPS_JCEMEDIABOX_TITLE (2.9.22) ? |

Components :: Admin ::
Core :: com_cache (4.0.0) 1 | com_workflow (4.0.0) 1 | com_fields (4.0.0) 1 | com_tags (4.0.0) 1 | com_wrapper (4.0.0) 1 | com_content (4.0.0) 1 | com_associations (4.0.0) 1 | com_search (3.0.0) 1 | com_scheduler (4.1.0) 1 | com_joomlaupdate (4.0.3) 1 | com_mails (4.0.0) 1 | com_messages (4.0.0) 1 | com_modules (4.0.0) 1 | com_login (4.0.0) 1 | com_categories (4.0.0) 1 | com_banners (4.0.0) 1 | com_privacy (3.9.0) 1 | com_weblinks (3.9.0) 1 | com_cpanel (4.0.0) 1 | com_redirect (4.0.0) 1 | com_installer (4.0.0) 1 | com_plugins (4.0.0) 1 | com_templates (4.0.0) 1 | com_ajax (4.0.0) 1 | com_config (4.0.0) 1 | com_finder (4.0.0) 1 | com_newsfeeds (4.0.0) 1 | com_contenthistory (4.0.0) 1 | com_actionlogs (3.9.0) 1 | com_checkin (4.0.0) 1 | com_users (4.0.0) 1 | com_languages (4.0.0) 1 | com_media (3.0.0) 1 | com_admin (4.0.0) 1 | com_menus (4.0.0) 1 | com_postinstall (4.0.0) 1 |
3rd Party:: Securitycheck (3.4.5) 1 | COM_MIJOPOLLS (1.1.4) ? | com_admintools (7.1.6) 1 | com_akeebabackup (9.2.2) 1 | OSE_FIREWALL (7.5.1) 1 | COM_ADVANCEDMODULES (9.1.1) 1 | Quick Logout (1.8.0) ? | Eyesite (6.07) 1 | com_uniterevolution2 (5.0.16) 1 | jshopping (5.0.4) 1 | COM_LSCACHE (1.5.1) 1 | com_komento (1.7.2) 1 | COM_JCE (2.9.22) 1 | com_loginguard (6.0.4) 1 | Akeeba (8.1.4) 1 |

Modules :: Site ::
Core :: mod_menu (3.0.0) 1 | mod_users_latest (3.0.0) 1 | mod_related_items (3.0.0) 1 | mod_articles_category (3.0.0) 1 | mod_custom (3.0.0) 1 | mod_stats (3.0.0) 1 | mod_tags_popular (3.1.0) 1 | mod_feed (3.0.0) 1 | mod_banners (3.0.0) 1 | mod_languages (3.5.0) 1 | mod_login (3.0.0) 1 | mod_articles_archive (3.0.0) 1 | mod_articles_popular (3.0.0) 1 | mod_footer (3.0.0) 1 | mod_random_image (3.0.0) 1 | mod_breadcrumbs (3.0.0) 1 | mod_articles_categories (3.0.0) 1 | mod_finder (3.0.0) 1 | mod_search (3.0.0) 1 | mod_whosonline (3.0.0) 1 | mod_syndicate (3.0.0) 1 | mod_articles_latest (3.0.0) 1 | mod_articles_news (3.0.0) 1 | mod_wrapper (3.0.0) 1 | mod_weblinks (3.9.0) 1 | mod_tags_similar (3.1.0) 1 |
3rd Party:: Jshopping Currencies (4.0.1) 1 | Responsive Contact Form (3.0) 1 | IceSlideShow Module (3.0.0) 1 | Jshopping top hits products (4.0.4) 1 | JoomShopping Recent Comments (4.0.2) ? | Jshopping Top Rating (4.0.4) 1 | IceCarosuel Module (3.0.0) 1 | Jshopping Wishlist (4.0.1) ? | Unite Slider 2 (4.7) 1 | Jshopping Categories (4.0.1) 1 | Jshopping Manufacturers (4.0.1) ? | Komento Activities (1.0.4) 1 | mod_jbcookies (3.1.9) 1 | Jshopping Bestseller Products (4.0.3) 1 | IceFilter (3.0.0) 1 | Jshopping Label Products (4.0.4) 1 | Jshopping Last Products (4.1.3) 1 | Jshopping Filters (4.0.0) 1 | Komento Comments (1.0.7) 1 | Jshopping Cart Modal (4.0.0) 1 | Jshopping Search (4.1.2) 1 | Jshopping Cart Ext. (4.0.2) 1 | MijoPolls (1.0.0) 1 |

Modules :: Admin ::
Core :: mod_menu (3.0.0) 1 | mod_post_installation_messages (4.0.0) 1 | mod_frontend (4.0.0) 1 | mod_messages (4.0.0) 1 | mod_popular (3.0.0) 1 | mod_toolbar (3.0.0) 1 | mod_privacy_dashboard (3.9.0) 1 | mod_custom (3.0.0) 1 | mod_sampledata (3.8.0) 1 | mod_loginsupport (4.0.0) 1 | mod_feed (3.0.0) 1 | mod_user (4.0.0) 1 | mod_multilangstatus (3.0.0) 1 | mod_login (3.0.0) 1 | mod_latestactions (3.9.0) 1 | mod_stats_admin (3.0.0) 1 | mod_logged (3.0.0) 1 | mod_version (3.0.0) 1 | mod_latest (3.0.0) 1 | mod_submenu (3.0.0) 1 | mod_title (3.0.0) 1 | mod_quickicon (3.0.0) 1 | mod_privacy_status (4.0.0) 1 |
3rd Party:: MOD_LSCACHE_NAME (1.0.0) 1 |

Libraries ::
Core ::
3rd Party:: file_fof30 (3.6.2) ? | Regular Labs Library (22.4.22216) 1 | file_fof40 (4.1.1) ? |

Plugins ::
Core :: plg_filesystem_local (4.0.0) 1 | plg_editors-xtd_readmore (3.0.0) 1 | plg_editors-xtd_module (3.5.0) 1 | plg_editors-xtd_menu (3.7.0) 1 | plg_editors-xtd_weblink (3.9.0) 0 | plg_editors-xtd_pagebreak (3.0.0) 1 | plg_editors-xtd_fields (3.7.0) 1 | plg_editors-xtd_article (3.0.0) 0 | plg_editors-xtd_image (3.0.0) 1 | plg_api-authentication_basic (4.0.0) 0 | plg_api-authentication_token (4.0.0) 1 | plg_webservices_languages (4.0.0) 1 | plg_webservices_redirect (4.0.0) 1 | plg_webservices_config (4.0.0) 1 | plg_webservices_media (4.1.0) 1 | plg_webservices_modules (4.0.0) 1 | plg_webservices_privacy (4.0.0) 1 | plg_webservices_content (4.0.0) 1 | plg_webservices_tags (4.0.0) 1 | plg_webservices_templates (4.0.0) 1 | plg_webservices_banners (4.0.0) 1 | plg_webservices_messages (4.0.0) 1 | plg_webservices_plugins (4.0.0) 1 | plg_webservices_installer (4.0.0) 1 | plg_webservices_menus (4.0.0) 1 | plg_webservices_users (4.0.0) 1 | plg_webservices_newsfeeds (4.0.0) 1 | plg_search_content (3.0.0) 1 | plg_search_tags (3.0.0) 1 | plg_search_categories (3.0.0) 1 | plg_search_contacts (3.0.0) 1 | plg_search_weblinks (3.9.0) 1 | plg_search_newsfeeds (3.0.0) 1 | plg_privacy_message (3.9.0) 1 | plg_privacy_actionlogs (3.9.0) 1 | plg_privacy_content (3.9.0) 1 | plg_privacy_consents (3.9.0) 1 | plg_privacy_user (3.9.0) 1 | plg_quickicon_joomlaupdate (3.0.0) 1 | plg_quickicon_phpversioncheck (3.7.0) 1 | plg_quickicon_privacycheck (3.9.0) 1 | plg_quickicon_overridecheck (4.0.0) 1 | plg_quickicon_downloadkey (4.0.0) 1 | plg_quickicon_extensionupdate (3.0.0) 1 | plg_twofactorauth_totp (3.2.0) 0 | plg_twofactorauth_yubikey (3.2.0) 0 | plg_content_loadmodule (3.0.0) 1 | plg_content_joomla (3.0.0) 1 | plg_content_geshi (3.0.0) 0 | plg_content_pagenavigation (3.0.0) 1 | plg_content_pagebreak (3.0.0) 1 | plg_content_vote (3.0.0) 1 | plg_content_fields (3.7.0) 1 | plg_content_confirmconsent (3.9.0) 1 | plg_content_finder (3.0.0) 1 | plg_content_emailcloak (3.0.0) 1 | plg_system_cache (3.0.0) 0 | plg_system_remember (3.0.0) 1 | plg_system_redirect (3.0.0) 1 | plg_system_httpheaders (4.0.0) 0 | plg_system_languagefilter (3.0.0) 0 | plg_system_highlight (3.0.0) 1 | plg_system_actionlogs (3.9.0) 1 | plg_system_privacyconsent (3.9.0) 1 | plg_system_logrotation (3.9.0) 1 | plg_system_accessibility (4.0.0) 0 | plg_system_languagecode (3.0.0) 0 | plg_system_logout (3.0.0) 1 | plg_system_skipto (4.0.0) 1 | plg_system_log (3.0.0) 1 | plg_system_sessiongc (3.8.6) 1 | plg_system_task_notification (4.1) 1 | plg_system_webauthn (4.0.0) 1 | plg_system_sef (3.0.0) 1 | plg_system_jooa11y (4.2.0) 1 | plg_system_stats (3.5.0) 1 | plg_system_debug (3.0.0) 1 | plg_system_fields (3.7.0) 1 | plg_system_weblinks (3.9.0) 0 | plg_system_updatenotification (3.5.0) 1 | plg_system_schedulerunner (4.1) 1 | plg_captcha_recaptcha_invisible (3.8) 1 | plg_captcha_recaptcha (3.4.0) 1 | 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_authentication_cookie (3.0.0) 1 | plg_authentication_joomla (3.0.0) 1 | plg_authentication_ldap (3.0.0) 0 | plg_workflow_featuring (4.0.0) 1 | plg_workflow_notification (4.0.0) 1 | plg_workflow_publishing (4.0.0) 1 | plg_installer_packageinstaller (3.6.0) 1 | plg_installer_urlinstaller (3.6.0) 1 | plg_installer_override (4.0.0) 1 | plg_installer_webinstaller (4.0.0) 1 | plg_installer_folderinstaller (3.6.0) 1 | plg_behaviour_versionable (4.0.0) 1 | plg_behaviour_taggable (4.0.0) 1 | plg_extension_joomla (3.0.0) 1 | plg_extension_namespacemap (4.0.0) 1 | plg_extension_finder (4.0.0) 1 | plg_sampledata_multilang (4.0.0) 1 | plg_fields_url (3.7.0) 1 | plg_fields_color (3.7.0) 1 | plg_fields_media (3.7.0) 1 | plg_fields_sql (3.7.0) 1 | plg_fields_subform (4.0.0) 1 | plg_fields_checkboxes (3.7.0) 1 | plg_fields_radio (3.7.0) 1 | plg_fields_list (3.7.0) 1 | plg_fields_usergrouplist (3.7.0) 1 | plg_fields_textarea (3.7.0) 1 | plg_fields_imagelist (3.7.0) 1 | plg_fields_text (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_integer (3.7.0) 1 | plg_actionlog_joomla (3.9.0) 1 | plg_finder_content (3.0.0) 1 | plg_finder_tags (3.0.0) 1 | plg_finder_categories (3.0.0) 1 | plg_finder_contacts (3.0.0) 1 | plg_finder_weblinks (3.9.0) 1 | plg_finder_newsfeeds (3.0.0) 1 | plg_user_profile (3.0.0) 1 | plg_user_token (3.9.0) 1 | plg_user_terms (3.9.0) 1 | plg_user_contactcreator (3.0.0) 0 | plg_user_joomla (3.0.0) 1 | plg_task_demo_tasks (4.1) 1 | plg_task_requests (4.1) 1 | plg_task_check_files (4.1) 1 | plg_task_site_status (4.1) 1 |
3rd Party:: PLG_EDITORS-XTD_SOURCERER (9.2.1) 1 | PLG_EDITORS-XTD_ARTICLESANYWHERE (12.3.0) 1 | JoomShopping - DetailTabs (1.0.0) ? | JoomShopping Second Description For (1.0.0) ? | JoomShopping Social Share (4.1.0) 1 | Search - JoomShopping (4.0.1) 1 | Search - MijoPolls (1.0.0) 0 | plg_editors_tinymce (5.10.3) 1 | plg_editors_jce (2.9.22) 1 | plg_editors_codemirror (5.65.2) 1 | PLG_QUICKICON_AKEEBABACKUP (9.2.2) 1 | plg_quickicon_jce (2.9.22) 1 | plg_quickicon_jcefilebrowser (2.3.4.3) 0 | AddThis - Bookmark and Sharing Tool (2.0.0) 1 | plg_content_jce (2.9.22) 1 | PLG_CONTENT_ACCORDIONFAQ (3.0.5) 1 | Content - Embed Google Map (1.2.1) 1 | Content - Load MijoPolls (1.0.0) 1 | Content - Komento (1.0) 0 | PLG_SYSTEM_ADVANCEDMODULES (9.1.1) 0 | plg_system_jce (2.9.22) 1 | PLG_SYSTEM_REGULARLABS (22.4.22216) 0 | PLG_SYSTEM_ADMINTOOLS (7.1.6) 1 | PLG_SYSTEM_LOGINGUARD (6.0.4) 0 | LiteSpeed Cache Plugin (1.5.1) 0 | PLG_SYSTEM_SOURCERER (9.2.1) 0 | T3 Framework (3.0.7) 1 | PLG_SYSTEM_ARTICLESANYWHERE (12.3.0) 0 | System - Securitycheck (3.4.5) 0 | PLG_SYSTEM_WEBKULPWA (1.0) 0 | System - Komento (1.0) 0 | PLG_SYSTEM_BACKUPONUPDATE (8.1.4) 1 | MijoPolls - JomSocial (1.0.0) 0 | MijoPolls - AlphaUserPoints (1.0.0) 0 | MijoPolls - Mighty Touch (1.0.0) 0 | PLG_LOGINGUARD_TOTP (6.0.4) 0 | PLG_LOGINGUARD_EMAIL (6.0.4) 0 | PLG_LOGINGUARD_YUBIKEY (6.0.4) 0 | PLG_LOGINGUARD_WEBAUTHN (6.0.4) 0 | PLG_LOGINGUARD_PUSHBULLET (6.0.4) 0 | PLG_LOGINGUARD_SMSAPI (6.0.4) 0 | PLG_LOGINGUARD_FIXED (6.0.4) 0 | plg_installer_jce (2.9.22) 1 | JoomShopping Product Seo (1.0.0) 1 | JoomShopping Second Description For (1.0.0) ? | plg_extension_jce (2.9.22) 1 | plg_fields_mediajce (2.9.22) 1 | PLG_ACTIONLOG_ADVANCEDMODULES (9.1.1) 0 | PLG_ACTIONLOG_AKEEBABACKUP (8.1.4) 0 | PLG_ACTIONLOG_ADMINTOOLS (7.1.6) 0 | PLG_ACTIONLOG_LOGINGUARD (6.0.4) 0 | PLG_USER_LOGINGUARD (6.0.4) 0 | User - Komento Users (1.0.0) 0 | JoomShopping Product Seo (1.0.0) 1 | JoomShopping Menu Builder (1.0.1) 1 | JoomShopping check db (1.0.0) ? | JoomShopping Plugin Resize Picture (3.2.3) 1 |

Templates :: Site :: cassiopeia (1.0) 1 | it_smartshop (1.0) 1 | esitemplate (1.0) 1 | jb_bookstore (1.9) 1 | TPL_FOO (1.0) ? |
Templates :: Admin :: atum (1.0) 1 |

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[toivo]

I am receiving:
"An error has occurred.
0 Class 'JParameter' not found"
This happened after upgrading from joomla 3 to 4

This error comes from an obsolete third party extension because the class JParameter was among the classes removed in Joomla 3.

Change the level of error reporting in Global Configuration to 'Maximum' and enable the Debug option. In the Logging tab select the option 'Log Almost Everything' so that the error log can be downloaded from administrator/logs/everything.php. Post the relevant messages from the log here for advice.

Here are also a couple of older topics how to deal with this error in Joomla 3, which may or may not help in your particular case:
Fatal error: Class 'JParameter' not found
Fatal error: Class 'JParameter' not found in ...Pls help

[deandre81]

thank you very much.
seems sorted.
had to also change template as the frontend was not loading