PayPall error after Woo 3.0 upgrade

This is an automatic translation

Good morning,
when paying with PayPall, after entering the data of the credit card and pressed the Continue button, I get this error and payment is aborted.

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Warning: Missing argument 1 for WC_Checkout::create_order(), called in /web/htdocs/www.namedomain.com/home/_nuovo/wp-content/plugins/express-checkout/includes/class-express-checkout-gateway.php on line 195 and defined in /web/htdocs/www.namedomain.com/home/_nuovo/wp-content/plugins/woocommerce/includes/class-wc-checkout.php on line 262

Warning: Invalid argument supplied for foreach() in /web/htdocs/www.namedomain.com/home/_nuovo/wp-content/plugins/woocommerce/includes/class-wc-checkout.php on line 289

Fatal error: Call to a member function is_type() on null in /web/htdocs/www.namedomain.com/home/_nuovo/wp-content/plugins/woocommerce/includes/class-wc-cart.php on line 543

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It happened with the Woo version 2.6

Thanks, Claudio