Fatal error: Uncaught Error: Call to a member function get_attributes() on bool in /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-cart.php:1052
Stack trace:
#0 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(936): WC_Cart->add_to_cart(1276, 1, 1280, Array)
#1 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(808): WC_Form_Handler::add_to_cart_handler_variable(1276)
#2 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-includes/class-wp-hook.php(324): WC_Form_Handler::add_to_cart_action('')
#3 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#4 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#5 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-settings.php(717): do_action('wp_loaded')
#6 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-config.php(102): require_once('/home/httpd/vho...')
#7 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-load.php(50): require_once('/home/httpd/vho...')
#8 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-blog-header.php(13): require_once('/home/httpd/vho...')
#9 /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/index.php(17): require('/home/httpd/vho...')
#10 {main}
  thrown in /home/httpd/vhosts/xn--chli-moa.ch/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-cart.php on line 1052