Fatal error: Uncaught Error: Call to undefined function Automattic\Jetpack\Assets\wp_is_serving_rest_request() in /home/u1353912/public_html/wp-content/plugins/wp-whatsapp-chat/jetpack_vendor/automattic/jetpack-assets/src/class-script-data.php:113 Stack trace: #0 /home/u1353912/public_html/wp-content/plugins/wp-whatsapp-chat/jetpack_vendor/automattic/jetpack-assets/src/class-script-data.php(88): Automattic\Jetpack\Assets\Script_Data::is_authenticated_rest_request() #1 /home/u1353912/public_html/wp-includes/class-wp-hook.php(308): Automattic\Jetpack\Assets\Script_Data::render_script_data() #2 /home/u1353912/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() #3 /home/u1353912/public_html/wp-includes/plugin.php(517): WP_Hook->do_action() #4 /home/u1353912/public_html/wp-includes/script-loader.php(2146): do_action() #5 /home/u1353912/public_html/wp-includes/class-wp-hook.php(308): wp_print_head_scripts() #6 /home/u1353912/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() #7 /home/u1353912/public_html/wp-includes/plugin.php(517): WP_Hook->do_action() #8 /home/u1353912/public_html/wp-includes/general-template.php(3049): do_action() #9 /home/u1353912/public_html/wp-content/themes/emilynolan/header.php(9): wp_head() #10 /home/u1353912/public_html/wp-includes/template.php(783): require_once('/home/u1353912/...') #11 /home/u1353912/public_html/wp-includes/template.php(718): load_template() #12 /home/u1353912/public_html/wp-includes/general-template.php(48): locate_template() #13 /home/u1353912/public_html/wp-content/themes/emilynolan/archive.php(3): get_header() #14 /home/u1353912/public_html/wp-includes/template-loader.php(106): include('/home/u1353912/...') #15 /home/u1353912/public_html/wp-blog-header.php(19): require_once('/home/u1353912/...') #16 /home/u1353912/public_html/index.php(17): require('/home/u1353912/...') #17 {main} thrown in /home/u1353912/public_html/wp-content/plugins/wp-whatsapp-chat/jetpack_vendor/automattic/jetpack-assets/src/class-script-data.php on line 113