Warning: Undefined variable $citation in /www/wwwroot/inlibrary.uz/plugins/generic/metaTags/MetaTagsPlugin.php on line 337

Fatal error: Uncaught TypeError: implode(): Argument #1 ($array) must be of type array, string given in /www/wwwroot/inlibrary.uz/plugins/generic/metaTags/MetaTagsPlugin.php:337 Stack trace: #0 /www/wwwroot/inlibrary.uz/plugins/generic/metaTags/MetaTagsPlugin.php(337): implode() #1 [internal function]: APP\plugins\generic\metaTags\MetaTagsPlugin->submissionView() #2 /www/wwwroot/inlibrary.uz/lib/pkp/classes/plugins/Hook.php(139): call_user_func_array() #3 /www/wwwroot/inlibrary.uz/lib/pkp/classes/plugins/Hook.php(113): PKP\plugins\Hook::run() #4 /www/wwwroot/inlibrary.uz/pages/article/ArticleHandler.php(354): PKP\plugins\Hook::call() #5 [internal function]: APP\pages\article\ArticleHandler->view() #6 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/PKPRouter.php(334): call_user_func() #7 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/PKPPageRouter.php(278): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #8 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route() #9 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/PKPApplication.php(395): PKP\core\Dispatcher->dispatch() #10 /www/wwwroot/inlibrary.uz/index.php(114): PKP\core\PKPApplication->execute() #11 {main} thrown in /www/wwwroot/inlibrary.uz/plugins/generic/metaTags/MetaTagsPlugin.php on line 337