All the orders performed with the PayPal payment provider end up with an error. The problem is related to the order total amount calculated by Vendr at some point in the checkout process. Here are the steps I follow:

1. I put in the cart an item with a price of 1.50€
2. In the checkout process, I choose the PayPal payment provider
3. I complete the payment of 1.50€ with PayPal

At the end of the process, the order has an "Error" status because the amount expected by Vendr for the order is 150€ (1.50 without the decimal separator) and so there are 148.50€ missing. If I choose Stripe as a payment provider, the order is completed correctly without any issue.