easyship update is giving an error at checkout

Cannot perform the checkout due to the errors showing up on our staging site checkout page. How do I fix this. It happened after easyship update

Notice: Undefined index: es_api_key in /home/customer/www/staging5.aveseena.com/public_html/wp-content/plugins/easyship-woocommerce-shipping-rates/includes/easyship-api.php on line 32

Notice: Undefined index: es_api_secret in /home/customer/www/staging5.aveseena.com/public_html/wp-content/plugins/easyship-woocommerce-shipping-rates/includes/easyship-api.php on line 33

Notice: Undefined index: es_taxes_duties in /home/customer/www/staging5.aveseena.com/public_html/wp-content/plugins/easyship-woocommerce-shipping-rates/includes/easyship-api.php on line 36