Site crashed

[LibbyCat50]

Please help. My site has crashed after updating. HTTP ERROR 500
Log file contents: [10-Sep-2017 10:30:09 UTC] WordPress database error Column 'phone' cannot be null for query INSERT INTO `ec_address` (`user_id`, `first_name`, `last_name`, `address_line_1`, `address_line_2`, `city`, `state`, `zip`, `country`, `phone`, `company_name`) VALUES (0, 'Gail', 'Shore', '77A Tuggerah Parade', '', 'The Entrance', 'NSW', '2261', 'AU', NULL, '') made by require('wp-blog-header.php'), wp, WP->main, do_action_ref_array, WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, load_ec_pre, ec_cartpage->process_form_action, ec_cartpage->process_save_checkout_info, ec_cartpage->process_save_checkout_info_helper, ec_db::insert_user_address

[matt_corley]

The issue here was the update to 4.0.0 being incompatible with PHP version 5.2 and less. We put out an update this morning, version 4.0.1 that corrected for this.