transaction cannot be puchased because an error with the email address

Hi there

Ive installed woocommerce on my site where i want to sell wp websites but it dont work properly with paypal. Ive already contact them and the say that woocommerce need something to reset to make the payment option ok.

You can find my site on https://www.dorffdesign.nl. If you try to order a wordpresstheme you get an error.
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[Too much code for here]

### Templates ###

Template Overrides: /woocommerce/archive-product.php, /woocommerce/content-product.php, /woocommerce/content-single-product.php, /woocommerce/single-product/product-image.php, /woocommerce/single-product/related.php, /woocommerce/single-product/short-description.php, /woocommerce/single-product/tabs/tabs.php, /woocommerce/single-product/up-sells.php, /woocommerce/single-product.php