Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class "Automattic\Jetpack\Assets" not found in /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-hook.php:324
Stack trace:
#0 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#1 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#2 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-scripts.php(166): do_action_ref_array('wp_default_scri...', Array)
#3 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-scripts.php(149): WP_Scripts->init()
#4 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/functions.wp-scripts.php(24): WP_Scripts->__construct()
#5 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/functions.wp-scripts.php(187): wp_scripts()
#6 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-content/plugins/woocommerce/includes/widgets/class-wc-widget-price-filter.php(37): wp_register_script('accounting', 'https://www.yfc...', Array, '0.4.2', Array)
#7 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-widget-factory.php(62): WC_Widget_Price_Filter->__construct()
#8 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/widgets.php(123): WP_Widget_Factory->register('WC_Widget_Price...')
#9 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-content/plugins/woocommerce/includes/wc-widget-functions.php(39): register_widget('WC_Widget_Price...')
#10 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-hook.php(324): wc_register_widgets('')
#11 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#12 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#13 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/widgets.php(1870): do_action('widgets_init')
#14 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-hook.php(324): wp_widgets_init('')
#15 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#16 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#17 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-settings.php(700): do_action('init')
#18 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-config.php(93): require_once('/customers/5/b/...')
#19 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-load.php(50): require_once('/customers/5/b/...')
#20 /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-blog-header.php(13): require_once('/customers/5/b/...')
#21 /customers/5/b/6/yfcschool.co.uk/httpd.www/index.php(17): require('/customers/5/b/...')
#22 {main}
  thrown in /customers/5/b/6/yfcschool.co.uk/httpd.www/wp-includes/class-wp-hook.php on line 324