Undefined index

I just tried to bought a product from my costumers site and got some errors.

(why isn’t it possible to upload images…)

This is the message:

Notice: Undefined index: address_1 in /storage/content/06/234706/firefighterfitness.se/public_html/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-checkout-handler.php on line 516 Notice: Undefined index: address_2 in /storage/content/06/234706/firefighterfitness.se/public_html/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-checkout-handler.php on line 517 Notice: Undefined index: city in /storage/content/06/234706/firefighterfitness.se/public_html/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-checkout-handler.php on line 518 Notice: Undefined index: postcode in /storage/content/06/234706/firefighterfitness.se/public_html/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-checkout-handler.php on line 519 Notice: Undefined index: state in /storage/content/06/234706/firefighterfitness.se/public_html/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-checkout-handler.php on line 520 Notice: Undefined index: country in /storage/content/06/234706/firefighterfitness.se/public_html/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-checkout-handler.php on line 521

Please help

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