My testing was done on my Dev site, and when I did the update on my live site (updated both plugins at the same time), the site looks normal, which is great, but it still triggered the email from WordPRess saying that My Site Is Experiencing a Technical Issue (thought I would pass it along in hopes that it helps to solve it for others in the next release):
Error Details
=============
An error of type E_ERROR was caused in line 360 of the file /public_html/wp-content/plugins/woocommerce/includes/class-wc-api.php. Error message: Uncaught Error: Class ‘WC_REST_Coupons_V1_Controller’ not found in /public_html/wp-content/plugins/woocommerce/includes/class-wc-api.php:360
Stack trace:
#0 /public_html/wp-includes/class-wp-hook.php(288): WC_API->register_rest_routes(Object(WP_REST_Server))
#1 /public_html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array)
#2 /public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /public_html/wp-includes/rest-api.php(471): do_action(‘rest_api_init’, Object(WP_REST_Server))
#4 /public_html/wp-includes/rest-api.php(429): rest_get_server()
#5 /public_html/wp-includes/rest-api.php(1539): rest_do_request(Object(WP_REST_Request))
#6 [internal function]: rest_preload_api_request(Array, ‘/wc/v3’)
#7 /public_html/wp-content/plugins/woocommerce-admin/includes/class-wc-admin-loader.php(521): array_reduce(Array, ‘rest_preload_ap…’)
#8 /public_html/wp-include