# Update 4.2.4 --\> 4.4 geting errors **URL:** \ **Category:** Configuration/Setup\ **Created:** [May 22, 2024, 1:21pm UTC](https://community.bluespice.com/t/update-4-2-4-4-4-geting-errors/133 "2024-05-22T13:21:19Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![danieljonas](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@danieljonas](https://community.bluespice.com/u/danieljonas)\ **Post date:** [May 22, 2024, 1:21pm UTC](https://community.bluespice.com/t/update-4-2-4-4-4-geting-errors/133/1 "2024-05-22T13:21:19Z")
Hey guys, after a Upgrade from 4.2.4 to 4.4 I am getting following error: MediaWiki internal error. Original exception: [ZkW64vQoxwZhgE7fvlvO9AAAAIM] /wiki/ Error: Call to undefined method User::isLoggedIn() Backtrace: from /var/www/extdata/html/bluespice/w/extensions/FlaggedRevs/backend/FlaggedRevsHooks.php(1373) #0 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookContainer.php(338): FlaggedRevsHooks::setSessionKey() #1 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookContainer.php(137): MediaWiki\HookContainer\HookContainer-\>callLegacyHook() #2 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookRunner.php(4260): MediaWiki\HookContainer\HookContainer-\>run() #3 /var/www/extdata/html/bluespice/w/includes/user/User.php(442): MediaWiki\HookContainer\HookRunner-\>onUserLoadAfterLoadFromSession() #4 /var/www/extdata/html/bluespice/w/includes/user/User.php(1660): User-\>load() #5 /var/www/extdata/html/bluespice/w/extensions/BlueSpiceFoundation/src/PermissionLockdownFactory.php(114): User-\>getId() #6 /var/www/extdata/html/bluespice/w/extensions/BlueSpiceFoundation/src/PermissionLockdownFactory.php(101): BlueSpice\PermissionLockdownFactory-\>getCacheKey() #7 /var/www/extdata/html/bluespice/w/extensions/BlueSpiceFoundation/src/PermissionLockdownFactory.php(60): BlueSpice\PermissionLockdownFactory-\>getLockownFromCache() #8 /var/www/extdata/html/bluespice/w/extensions/BlueSpiceFoundation/src/Hook/GetUserPermissionsErrors/ApplyLockdown.php(31): BlueSpice\PermissionLockdownFactory-\>newFromTitleAndUserRelation() #9 /var/www/extdata/html/bluespice/w/extensions/BlueSpiceFoundation/src/Hook/GetUserPermissionsErrors/ApplyLockdown.php(10): BlueSpice\Hook\GetUserPermissionsErrors\ApplyLockdown-\>getLockdown() #10 /var/www/extdata/html/bluespice/w/extensions/BlueSpiceFoundation/src/Hook.php(121): BlueSpice\Hook\GetUserPermissionsErrors\ApplyLockdown-\>skipProcessing() #11 /var/www/extdata/html/bluespice/w/extensions/BlueSpiceFoundation/src/Hook/GetUserPermissionsErrors.php(74): BlueSpice\Hook-\>process() #12 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookContainer.php(338): BlueSpice\Hook\GetUserPermissionsErrors::callback() #13 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookContainer.php(137): MediaWiki\HookContainer\HookContainer-\>callLegacyHook() #14 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookRunner.php(1966): MediaWiki\HookContainer\HookContainer-\>run() #15 /var/www/extdata/html/bluespice/w/includes/Permissions/PermissionManager.php(584): MediaWiki\HookContainer\HookRunner-\>onGetUserPermissionsErrors() #16 /var/www/extdata/html/bluespice/w/includes/Permissions/PermissionManager.php(539): MediaWiki\Permissions\PermissionManager-\>checkPermissionHooks() #17 /var/www/extdata/html/bluespice/w/includes/Permissions/PermissionManager.php(346): MediaWiki\Permissions\PermissionManager-\>getPermissionErrorsInternal() #18 /var/www/extdata/html/bluespice/w/includes/Permissions/UserAuthority.php(259): MediaWiki\Permissions\PermissionManager-\>getPermissionErrors() #19 /var/www/extdata/html/bluespice/w/includes/Permissions/UserAuthority.php(205): MediaWiki\Permissions\UserAuthority-\>internalCan() #20 /var/www/extdata/html/bluespice/w/includes/user/User.php(3496): MediaWiki\Permissions\UserAuthority-\>authorizeRead() #21 /var/www/extdata/html/bluespice/w/includes/MediaWiki.php(227): User-\>authorizeRead() #22 /var/www/extdata/html/bluespice/w/includes/MediaWiki.php(904): MediaWiki-\>performRequest() #23 /var/www/extdata/html/bluespice/w/includes/MediaWiki.php(562): MediaWiki-\>main() #24 /var/www/extdata/html/bluespice/w/index.php(50): MediaWiki-\>run() #25 /var/www/extdata/html/bluespice/w/index.php(46): wfIndexMain() #26 {main} Exception caught inside exception handler: [ZkW64vQoxwZhgE7fvlvO9AAAAIM] /wiki/ Error: Class “MWNamespace” not found Backtrace: from /var/www/extdata/html/bluespice/w/extensions/FlaggedRevs/backend/FlaggedRevs.php(49) #0 /var/www/extdata/html/bluespice/w/extensions/FlaggedRevs/backend/FlaggedRevs.php(928): FlaggedRevs::load() #1 /var/www/extdata/html/bluespice/w/extensions/FlaggedRevs/backend/FlaggedRevs.php(945): FlaggedRevs::getReviewNamespaces() #2 /var/www/extdata/html/bluespice/w/extensions/FlaggedRevs/frontend/FlaggablePageView.php(1365): FlaggedRevs::inReviewNamespace() #3 /var/www/extdata/html/bluespice/w/extensions/FlaggedRevs/frontend/FlaggedRevsUIHooks.php(95): FlaggablePageView-\>addStabilizationLink() #4 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookContainer.php(338): FlaggedRevsUIHooks::onBeforePageDisplay() #5 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookContainer.php(137): MediaWiki\HookContainer\HookContainer-\>callLegacyHook() #6 /var/www/extdata/html/bluespice/w/includes/HookContainer/HookRunner.php(946): MediaWiki\HookContainer\HookContainer-\>run() #7 /var/www/extdata/html/bluespice/w/includes/OutputPage.php(2871): MediaWiki\HookContainer\HookRunner-\>onBeforePageDisplay() #8 /var/www/extdata/html/bluespice/w/includes/exception/MWExceptionRenderer.php(183): OutputPage-\>output() #9 /var/www/extdata/html/bluespice/w/includes/exception/MWExceptionRenderer.php(102): MWExceptionRenderer::reportHTML() #10 /var/www/extdata/html/bluespice/w/includes/exception/MWExceptionHandler.php(131): MWExceptionRenderer::output() #11 /var/www/extdata/html/bluespice/w/includes/exception/MWExceptionHandler.php(248): MWExceptionHandler::report() #12 /var/www/extdata/html/bluespice/w/includes/MediaWiki.php(584): MWExceptionHandler::handleException() #13 /var/www/extdata/html/bluespice/w/index.php(50): MediaWiki-\>run() #14 /var/www/extdata/html/bluespice/w/index.php(46): wfIndexMain() #15 {main} I don’t know what to do, I already googled a lot, without success. Can someone help me with this error? Here my system: - OS: RHEL 7 - Server: nginx 1.18 - PHP: 8.0 - Database: mysql 5.7 - BlueSpice version: 4.4 ---
**Author:** ![djagszent](https://dub1.discourse-cdn.com/flex017/user_avatar/community.bluespice.com/djagszent/32/75_2.png) [@djagszent](https://community.bluespice.com/u/djagszent)\ **Post date:** [May 22, 2024, 11:56pm UTC](https://community.bluespice.com/t/update-4-2-4-4-4-geting-errors/133/2 "2024-05-22T23:56:25Z")
Is this an older BlueSpice installation with outdated entries in in the `extensions/BlueSpiceFoundation/config/nm-settings.php` file? You might also experience this bug [Upgrade BlueSpice 3 to 4: Global $wgLang is null](https://community.bluespice.com/t/upgrade-bluespice-3-to-4-global-wglang-is-null/87) It wipes out the whole `$_GLOBALS` array including the global `$wgUser`