'In Transit' means that the specific payment you are looking at is in transfer to your account or has been pulled to be processed in your weekly payout.
Payments that are In Transit cannot be stopped. Please ensure that you keep your Stripe account updated with your most current payout method. To learn how to update your payout method, see this article -How do I edit/update my bank account or debit card information?
For more payout information, check out this article: Understanding The Weekly Payout