I'm trying to set up WooCommerce and encountering the error: "There has been a critical error on this website" during checkout. I have disabled all plugins and tested a fresh WordPress installation on a subdomain, but the issue persists. [25-Sep-2024 11:11:23 UTC] PHP Fatal error: Uncaught Error: Call to undefined function PHPMailer\PHPMailer\mail() in /home/bontonst/public_html/wp-includes/PHPMailer/PHPMailer.php:881 Stack trace: #0 /home/bontonst/public_html/wp-includes/PHPMailer/PHPMailer.php(1972): PHPMailer\PHPMailer\PHPMailer->mailPassthru() #1 /home/bontonst/public_html/wp-includes/PHPMailer/PHPMailer.php(1693): PHPMailer\PHPMailer\PHPMailer->mailSend() #2 /home/bontonst/public_html/wp-includes/PHPMailer/PHPMailer.php(1525): PHPMailer\PHPMailer\PHPMailer->postSend() #3 /home/bontonst/public_html/wp-includes/pluggable.php(546): PHPMailer\PHPMailer\PHPMailer->send() #4 /home/bontonst/public_html/wp-content/plugins/woocommerce/includes/emails/class-wc-email.php(741): wp_mail() #5 /home/bontonst/public_html/wp-content/plugins/woocommerce/includes/emails/class-wc-email-new-order.php(112): WC_Email->send() #6 /home/bontonst/public_html/wp-includes/class-wp-hook.php(324): WC_Email_New_Order->trigger() #7 /home/bontonst/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #8 /home/bontonst/public_html/wp-includes/plugin.php(565): WP_Hook->do_action() #9 /home/bontonst/public_html/wp-content/plugins/woocommerce/includes/class-wc-emails.php(172): do_action_ref_array() #10 /home/bontonst/public_html/wp-includes/class-wp-hook.php(324): WC_Emails::send_transactional_email() #11 /home/bontonst/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #12 /home/bontonst/public_html/wp-includes/plugin.php(517): WP_Hook->do_action() #13 /home/bontonst/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(420): do_action() #14 /home/bontonst/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(253): WC_Order->status_transition() #15 /home/bontonst/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(365): WC_Order->save() #16 /home/bontonst/public_html/wp-content/plugins/woocommerce/includes/gateways/bacs/class-wc-gateway-bacs.php(390): WC_Order->update_status() #17 /home/bontonst/public_html/wp-content/plugins/woocommerce/src/StoreApi/Legacy.php(54): WC_Gateway_BACS->process_payment() #18 /home/bontonst/public_html/wp-includes/class-wp-hook.php(324): Automattic\WooCommerce\StoreApi\Legacy->process_legacy_payment() #19 /home/bontonst/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #20 /home/bontonst/public_html/wp-includes/plugin.php(565): WP_Hook->do_action() #21 /home/bontonst/public_html/wp-content/plugins/woocommerce/src/StoreApi/Utilities/CheckoutTrait.php(83): do_action_ref_array() #22 /home/bontonst/public_html/wp-content/plugins/woocommerce/src/StoreApi/Routes/V1/Checkout.php(349): Automattic\WooCommerce\StoreApi\Routes\V1\Checkout->process_payment() #23 /home/bontonst/public_html/wp-content/plugins/woocommerce/src/StoreApi/Routes/V1/AbstractRoute.php(119): Automattic\WooCommerce\StoreApi\Routes\V1\Checkout->get_route_post_response() #24 /home/bontonst/public_html/wp-content/plugins/woocommerce/src/StoreApi/Routes/V1/Checkout.php(138): Automattic\WooCommerce\StoreApi\Routes\V1\AbstractRoute->get_response_by_request_method() #25 /home/bontonst/public_html/wp-includes/rest-api/class-wp-rest-server.php(1230): Automattic\WooCommerce\StoreApi\Routes\V1\Checkout->get_response() #26 /home/bontonst/public_html/wp-includes/rest-api/class-wp-rest-server.php(1063): WP_REST_Server->respond_to_request() #27 /home/bontonst/public_html/wp-includes/rest-api/class-wp-rest-server.php(439): WP_REST_Server->dispatch() #28 /home/bontonst/public_html/wp-includes/rest-api.php(420): WP_REST_Server->serve_request() #29 /home/bontonst/public_html/wp-includes/class-wp-hook.php(324): rest_api_loaded() #30 /home/bontonst/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #31 /home/bontonst/public_html/wp-includes/plugin.php(565): WP_Hook->do_action() #32 /home/bontonst/public_html/wp-includes/class-wp.php(418): do_action_ref_array() #33 /home/bontonst/public_html/wp-includes/class-wp.php(813): WP->parse_request() #34 /home/bontonst/public_html/wp-includes/functions.php(1336): WP->main() #35 /home/bontonst/public_html/wp-blog-header.php(16): wp() #36 /home/bontonst/public_html/index.php(17): require('/home/bontonst/...') #37 {main} thrown in /home/bontonst/public_html/wp-includes/PHPMailer/PHPMailer.php on line 881