Multi banko not working

Hi there,

Multibanko is not working on our website. While checking the fatal error log, this is the error list we are getting

2021-06-14T22:39:01+00:00 CRITICAL Uncaught Error: Class 'SoapClient' not found in /var/www/html/wp-content/plugins/eupago-for-woocommerce/includes/class-wc-eupago-api.php:52 Stack trace: #0 /var/www/html/wp-content/plugins/eupago-for-woocommerce/includes/class-wc-eupago-multibanco.php(290): WC_EuPago_API->getReferenciaMB(214857, '120.00', '') #1 /var/www/html/wp-content/plugins/woocommerce/includes/class-wc-checkout.php(923): WC_EuPago_Multibanco_WebAtual->process_payment(214857) #2 /var/www/html/wp-content/plugins/woocommerce/includes/class-wc-checkout.php(1123): WC_Checkout->process_order_payment(214857, 'eupago_multiban...') #3 /var/www/html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(462): WC_Checkout->process_checkout() #4 /var/www/html/wp-includes/class-wp-hook.php(288): WC_AJAX::checkout('') #5 /var/www/html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters('', Array) #6 /var/www/html/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #7 /var/www/html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php( em /var/www/html/wp-content/plugins/eupago-for-woocommerce/includes/class-wc-eupago-api.php na linha 5

I confirm that our API key is configured on the website. yet we are unable to access the API URL

Thanks in advance