Error activating Stripe Payment

Hi there,

I can install the plugin and activate it. But problem come when I configure it and I press Save changes.

Just after typing the API keys to make it work, I get the following error:

Fatal error: Uncaught Error: Class ‘stripe’ not found in /customers/6/5/1/milanobags.es/httpd.www/wp-content/plugins/woocommerce-pay-for-payment/admin/class-pay4pay-admin.php:209 Stack trace: #0 /customers/6/5/1/milanobags.es/httpd.www/wp-includes/class-wp-hook.php(286): Pay4Pay_Admin->update_payment_options(”) #1 /customers/6/5/1/milanobags.es/httpd.www/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(false, Array) #2 /customers/6/5/1/milanobags.es/httpd.www/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /customers/6/5/1/milanobags.es/httpd.www/wp-content/plugins/woocommerce/includes/admin/settings/class-wc-settings-checkout.php(371): do_action(‘woocommerce_upd…’) #4 /customers/6/5/1/milanobags.es/httpd.www/wp-includes/class-wp-hook.php(286): WC_Settings_Payment_Gateways->save(”) #5 /customers/6/5/1/milanobags.es/httpd.www/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(”, Array) #6 /customers/6/5/1/milanobags.es/httpd.www/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #7 /cus in /customers/6/5/1/milanobags.es/httpd.www/wp-content/plugins/woocommerce-pay-for-payment/admin/class-pay4pay-admin.php on line 209

Hope you can help me out guys.

Thanks a lot,

Regards.