If you are facing issues while making payment through Stripe checkout in WP Travel, please once verify if ‘Test Mode‘ is enabled or not? If ‘Test Mode‘ option has been enabled then please disable this option by going to Admin Panel > WP Travel > Settings > Debug
Also, please verify if the keys (publishable key & secret key ) required for Stripe checkout gateway has been added or not by going to Admin Panel > WP Travel > Settings > Payment > Stripe Checkout
Further, make sure that the keys (publishable key & secret key) that you have added for the Stripe checkout payment gateway are correct.
If you have any confusion then please post them in our official support forum.