Hi Rad,
I have added a secure note with login details - for the site and cpanel.
I think the majority of the error log is filled with what looks like outdated commands (a snippet below)
27-Apr-2018 16:22:56 UTC] The WC_Cart::ship_to_billing_address_only function is deprecated since version 2.5. Replace with wc_ship_to_billing_address_only.
[27-Apr-2018 16:23:00 UTC] id was called incorrectly. Order properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), do_action(‘template_redirect’), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::do_wc_ajax, do_action(‘wc_ajax_checkout’), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::checkout, WC_Checkout->process_checkout, WC_Checkout->process_order_without_payment, WC_Order->payment_complete, WC_Order->save, WC_Order->status_transition, do_action(‘woocommerce_order_status_pending_to_completed’), WP_Hook->do_action, WP_Hook->apply_filters, WC_Emails::send_transactional_email, do_action_ref_array, WP_Hook->do_action, WP_Hook->apply_filters, WC_Email_New_Order->trigger, WC_Email->get_content, WC_Email_New_Order->get_content_html, wc_get_template_html, wc_get_template, include(’/plugins/woocommerce/templates/emails/admin-new-order.php’), do_action(‘woocommerce_email_order_details’), WP_Hook->do_action, WP_Hook->apply_filters, WC_Emails->order_details, wc_get_template, include(’/plugins/woocommerce/templates/emails/email-order-details.php’), do_action(‘woocommerce_email_after_order_table’), WP_Hook->do_action, WP_Hook->apply_filters, Tco_Woo_Hooks::email_other_fields_list, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0.
[27-Apr-2018 16:23:00 UTC] id was called incorrectly. Order properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), do_action(‘template_redirect’), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::do_wc_ajax, do_action(‘wc_ajax_checkout’), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::checkout, WC_Checkout->process_checkout, WC_Checkout->process_order_without_payment, WC_Order->payment_complete, WC_Order->save, WC_Order->status_transition, do_action(‘woocommerce_order_status_pending_to_completed’), WP_Hook->do_action, WP_Hook->apply_filters, WC_Emails::send_transactional_email, do_action_ref_array, WP_Hook->do_action, WP_Hook->apply_filters, WC_Email_New_Order->trigger, WC_Email->get_content, WC_Email_New_Order->get_content_html, wc_get_template_html, wc_get_template, include(’/plugins/woocommerce/templates/emails/admin-new-order.php’), do_action(‘woocommerce_email_customer_details’), WP_Hook->do_action, WP_Hook->apply_filters, WC_Emails->email_addresses, wc_get_template, include(’/plugins/woocommerce/templates/emails/email-addresses.php’), WC_Order->get_formatted_billing_address, apply_filters(‘woocommerce_order_formatted_billing_address’), WP_Hook->apply_filters, Tco_Woo_Hooks::order_formatted_billing_address, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0.