WordPress te sayfa ekleme de aşağıda ki hatayı alıyorum. Yardımcı olabilecek olan var mı?
Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($function) must be a valid callback, function "education_x_excerpt_length" not found or invalid function name in C:\xampp\htdocs\egitim\wp-includes\class-wp-hook.php:292 Stack trace: #0 C:\xampp\htdocs\egitim\wp-includes\plugin.php(212): WP_Hook->apply_filters(55, Array) #1 C:\xampp\htdocs\egitim\wp-includes\formatting.php(3836): apply_filters('excerpt_length', 55) #2 C:\xampp\htdocs\egitim\wp-includes\class-wp-hook.php(292): wp_trim_excerpt('', Object(WP_Post)) #3 C:\xampp\htdocs\egitim\wp-includes\plugin.php(212): WP_Hook->apply_filters('', Array) #4 C:\xampp\htdocs\egitim\wp-includes\rest-api\endpoints\class-wp-rest-posts-controller.php(1779): apply_filters('get_the_excerpt', '', Object(WP_Post)) #5 C:\xampp\htdocs\egitim\wp-includes\rest-api\endpoints\class-wp-rest-posts-controller.php(550): WP_REST_Posts_Controller->prepare_item_for_response(Object(WP_Post), Object(WP_REST_Request)) #6 C:\xampp\htdocs\egitim\wp-includes\rest-api\class-wp-rest-server.php(1139): WP_REST_Posts_Controller->get_item(Object(WP_REST_Request)) #7 C:\xampp\htdocs\egitim\wp-includes\rest-api\class-wp-rest-server.php(985): WP_REST_Server->respond_to_request(Object(WP_REST_Request), '/wp/v2/pages/(?...', Array, NULL) #8 C:\xampp\htdocs\egitim\wp-includes\rest-api.php(479): WP_REST_Server->dispatch(Object(WP_REST_Request)) #9 C:\xampp\htdocs\egitim\wp-includes\rest-api.php(2816): rest_do_request(Object(WP_REST_Request)) #10 [internal function]: rest_preload_api_request(Array, '/wp/v2/pages/9?...') #11 C:\xampp\htdocs\egitim\wp-admin\edit-form-blocks.php(82): array_reduce(Array, 'rest_preload_ap...', Array) #12 C:\xampp\htdocs\egitim\wp-admin\post-new.php(72): require('C:\\xampp\\htdocs...') #13 {main} thrown in C:\xampp\htdocs\egitim\wp-includes\class-wp-hook.php on line 292