Title: Fatal error: function “pll_custom_flag” not found Last modified: February 9, 2023 --- # Fatal error: function “pll_custom_flag” not found * Resolved [rfmh](https://wordpress.org/support/users/rfmh/) * (@rfmh) * [3 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-function-pll_custom_flag-not-found/) * hi, * i get this error when i click on ADD NEW POST it doesnt seem to be related to that lingotek issue reported lately * as it doesnt show any mention about lingotek in the error messages i tried to downgrade to 3.3 and 3.2 but same issue stillplease help me on how to fix thisthanks * **Fatal error**: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function “pll_custom_flag” not found or invalid function name in /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-includes/class- wp-hook.php:308 Stack trace: #0 /homepages/8/d891879434/htdocs/clickandbuilds/ GrabandGo/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) # 1 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-content/plugins/ polylang/include/language.php(320): apply_filters(‘pll_custom_flag’, Array, ‘ mm’) #2 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-content/plugins/ polylang/include/links-model.php(184): PLL_Language->set_flag() #3 /homepages/ 8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-includes/class-wp-hook.php(310): PLL_Links_Model->pll_languages_list(Array) #4 /homepages/8/d891879434/htdocs/ clickandbuilds/GrabandGo/wp-includes/plugin.php(205): WP_Hook->apply_filters( Array, Array) #5 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-content/ plugins/polylang/include/model.php(133): apply_filters(‘pll_languages_l…’, Array, Object(PLL_Model)) #6 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/ wp-content/plugins/polylang/include/translated-object.php(559): PLL_Model->get_languages_list( Array) #7 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-content/ plugins/polylang/include/translated-object.php(343): PLL_Translated_Object->validate_translations( Array, 22672, ‘display’) #8 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/ wp-content/plugins/polylang/modules/sync/sync-tax.php(175): PLL_Translated_Object- >get_translations(22672) #9 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/ wp-includes/class-wp-hook.php(310): PLL_Sync_Tax->set_object_terms(22672, Array, Array, ‘language’, false) #10 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/ wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #11 / homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-includes/plugin.php( 517): WP_Hook->do_action(Array) #12 /homepages/8/d891879434/htdocs/clickandbuilds/ GrabandGo/wp-includes/taxonomy.php(2879): do_action(‘set_object_term…’, 22672, Array, Array, ‘language’, false, Array) #13 /homepages/8/d891879434/htdocs/clickandbuilds/ GrabandGo/wp-includes/post.php(5261): wp_set_object_terms(22672, Array, ‘language’, false) #14 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-content/ plugins/polylang/include/translated-post.php(63): wp_set_post_terms(22672, Array,‘ language’) #15 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-content/ plugins/polylang/include/crud-posts.php(77): PLL_Translated_Post->set_language( 22672, ‘my’) #16 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-content/ plugins/polylang/include/crud-posts.php(105): PLL_CRUD_Posts->set_default_language( 22672) #17 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-includes/ class-wp-hook.php(310): PLL_CRUD_Posts->save_post(22672, Object(WP_Post)) #18/ homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-includes/class-wp-hook. php(332): WP_Hook->apply_filters(NULL, Array) #19 /homepages/8/d891879434/htdocs/ clickandbuilds/GrabandGo/wp-includes/plugin.php(517): WP_Hook->do_action(Array)# 20 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-includes/post.php( 4717): do_action(‘save_post’, 22672, Object(WP_Post), false) #21 /homepages/8/ d891879434/htdocs/clickandbuilds/GrabandGo/wp-admin/includes/post.php(699): wp_insert_post( Array, false, false) #22 /homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/ wp-admin/post-new.php(66): get_default_post_to_edit(‘post’, true) #23 {main} thrown in **/homepages/8/d891879434/htdocs/clickandbuilds/GrabandGo/wp-includes/ class-wp-hook.php** on line **308** Viewing 2 replies - 1 through 2 (of 2 total) * Thread Starter [rfmh](https://wordpress.org/support/users/rfmh/) * (@rfmh) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-function-pll_custom_flag-not-found/#post-16458044) * i found the issue * it was old custom code, that is not supported anymore as it seems * function avada_lang_setup() { $lang = get_stylesheet_directory() . ‘/languages’; load_child_theme_textdomain( ‘Avada’, $lang );}add_action( ‘after_setup_theme’,‘ avada_lang_setup’ ); * add_filter( ‘pll_custom_flag’, ‘pll_custom_flag’, 10, 2 ); * Thread Starter [rfmh](https://wordpress.org/support/users/rfmh/) * (@rfmh) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-function-pll_custom_flag-not-found/#post-16458047) * fixed Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘Fatal error: function “pll_custom_flag” not found’ is closed to new replies. * ![](https://ps.w.org/polylang/assets/icon-256x256.png?rev=3433336) * [Polylang](https://wordpress.org/plugins/polylang/) * [Frequently Asked Questions](https://wordpress.org/plugins/polylang/#faq) * [Support Threads](https://wordpress.org/support/plugin/polylang/) * [Active Topics](https://wordpress.org/support/plugin/polylang/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/polylang/unresolved/) * [Reviews](https://wordpress.org/support/plugin/polylang/reviews/) * 2 replies * 1 participant * Last reply from: [rfmh](https://wordpress.org/support/users/rfmh/) * Last activity: [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-function-pll_custom_flag-not-found/#post-16458047) * Status: resolved