[24-Apr-2018 10:49:57 UTC] PHP Fatal error:  Uncaught Error: Call to a member function getNumber() on null in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php:252
Stack trace:
#0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
#1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
#2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
#3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
#5 {main}
  thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
[24-Apr-2018 10:50:02 UTC] PHP Fatal error:  Uncaught Error: Call to a member function getNumber() on null in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php:252
Stack trace:
#0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
#1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
#2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
#3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
#5 {main}
  thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
[24-Apr-2018 10:50:03 UTC] PHP Fatal error:  Uncaught Error: Call to a member function getNumber() on null in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php:252
Stack trace:
#0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
#1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
#2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
#3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
#5 {main}
  thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
[24-Apr-2018 10:50:06 UTC] PHP Fatal error:  Uncaught Error: Call to a member function getNumber() on null in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php:252
Stack trace:
#0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
#1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
#2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
#3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
#5 {main}
  thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
[24-Apr-2018 10:50:34 UTC] PHP Fatal error:  Uncaught Error: Call to a member function getNumber() on null in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php:252
Stack trace:
#0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
#1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
#2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
#3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
#5 {main}
  thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252