Woocommerce checkout page error and slow loading

When submitting an order the page load takes a few minutes and then shows an error, yet on the back end the order is placed. The loading time takes very long and the person placing order does not properly get to the woocomerce thank you page. Please message if you understand the task and only apply if you are available to fix this right away. Please let me know your favorite food so I know you read the task. Thank you