1. [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
2. Stack trace:
3. #0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
4. #1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
5. #2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
6. #3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
7. #4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
8. #5 {main}
9.   thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
10. [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
11. Stack trace:
12. #0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
13. #1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
14. #2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
15. #3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
16. #4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
17. #5 {main}
18.   thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
19. [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
20. Stack trace:
21. #0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
22. #1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
23. #2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
24. #3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
25. #4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
26. #5 {main}
27.   thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
28. [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
29. Stack trace:
30. #0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
31. #1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
32. #2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
33. #3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
34. #4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
35. #5 {main}
36.   thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252
37. [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
38. Stack trace:
39. #0 /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php(289): invoiceWoocommerceOrder->generateInvoice(true)
40. #1 /wp-includes/class-wp-hook.php(286): invoiceWoocommerceOrder->generateInvoiceAction('')
41. #2 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)
42. #3 /wp-includes/plugin.php(453): WP_Hook->do_action(Array)
43. #4 /wp-admin/admin-ajax.php(97): do_action('wp_ajax_woocomm...')
44. #5 {main}
45.   thrown in /wp-content/plugins/flexible-invoices-woocommerce/class/invoiceWoocommerceOrder.php on line 252