emmanuelberanger

Thank you @jamienuminix,

I tried to update the wp-admin and wp-includes files with wordpress 7.0, (that I was unable to do when I had control of backoffice). I no longer have the fatal error form the “call_user_func_array()” but I have two fatal error like this :

Fatal error: Uncaught Error: Call to undefined function wp_is_valid_utf8() in /home/emmanuelzh/www/wp-includes/formatting.php:2290 Stack trace: #0 /home/emmanuelzh/www/wp-includes/class-wp-taxonomy.php(378): sanitize_title_with_dashes('category_name') #1 /home/emmanuelzh/www/wp-includes/class-wp-taxonomy.php(290): WP_Taxonomy->set_props('post', Array) #2 /home/emmanuelzh/www/wp-includes/taxonomy.php(532): WP_Taxonomy->__construct('category', 'post', Array) #3 /home/emmanuelzh/www/wp-includes/taxonomy.php(63): register_taxonomy('category', 'post', Array) #4 /home/emmanuelzh/www/wp-settings.php(513): create_initial_taxonomies() #5 /home/emmanuelzh/www/wp-config.php(94): require_once('/home/emmanuelz...') #6 /home/emmanuelzh/www/wp-load.php(50): require_once('/home/emmanuelz...') #7 /home/emmanuelzh/www/wp-admin/admin.php(35): require_once('/home/emmanuelz...') #8 /home/emmanuelzh/www/wp-admin/edit.php(10): require_once('/home/emmanuelz...') #9 {main} thrown in /home/emmanuelzh/www/wp-includes/formatting.php on line 2290

Fatal error: Uncaught Error: Call to undefined function wp_is_valid_utf8() in /home/emmanuelzh/www/wp-includes/formatting.php:1140 Stack trace: #0 /home/emmanuelzh/www/wp-includes/formatting.php(4706): wp_check_invalid_utf8('fr-FR') #1 /home/emmanuelzh/www/wp-includes/general-template.php(4549): esc_attr('fr-FR') #2 /home/emmanuelzh/www/wp-includes/functions.php(3918): get_language_attributes() #3 /home/emmanuelzh/www/wp-includes/functions.php(3851): _default_wp_die_handler('<div class="wp-...', 'WordPress > Err...', Array) #4 /home/emmanuelzh/www/wp-includes/class-wp-fatal-error-handler.php(245): wp_die(Object(WP_Error), '', Array) #5 /home/emmanuelzh/www/wp-includes/class-wp-fatal-error-handler.php(156): WP_Fatal_Error_Handler->display_default_error_template(Array, false) #6 /home/emmanuelzh/www/wp-includes/class-wp-fatal-error-handler.php(60): WP_Fatal_Error_Handler->display_error_template(Array, false) #7 [internal function]: WP_Fatal_Error_Handler->handle() #8 {main} thrown in /home/emmanuelzh/www/wp-includes/formatting.php on line 1140

I’m sorry for thoses messages but I don’t know anything about code …
Thank you again for your help