Critical error after last update

Hello. After last update my dashboard became unavailable and I got this critical error:

Un errore di E_ERROR è stato causato nella linea 1346 del file xxxxxxxxxxxxxxxxx/wp-content/plugins/woocommerce/includes/class-wc-checkout.php. Messaggio di errore: Uncaught Error: Call to a member function meta_exists() on null in xxxxxxxxxxxxxxxxx/wp-content/plugins/woocommerce/includes/class-wc-checkout.php:1346
Stack trace:
#0 xxxxxxxxxxxxxxxxx/wp-content/plugins/payment-gateways-per-product-categories-for-woocommerce/includes/class-alg-wc-pgpp-core.php(154): WC_Checkout->get_value('billing_country')
#1 xxxxxxxxxxxxxxxxx/wp-includes/class-wp-hook.php(308): Alg_WC_PGPP_Core->filter_available_payment_gateways_per_category(Array)
#2 xxxxxxxxxxxxxxxxx/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array)
#3 xxxxxxxxxxxxxxxxx/wp-content/plugins/woocommerce/includes/class-wc-payment-gateways.php(163): apply_filters('woocommerce_ava...', Array)
#4 xxxxxxxxxxxxxxxxx/wp-content/plugins/woocommerce-paypal-payments/modules/ppcp-wc-gateway/services.php(1322): WC_Payment_Gateways->get_available_payment_gateways()
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Deactivating this plugin I was able to get back into the Dashboard. Any idea on how to fix it? Thanks.