admin/commerce/orders/{orderId}/payments/add "You are not authorized to access this page." When I try to add a new payment to an order (either created by a customer or via the backend) I always encounter the "You are not authorized to access this page." error. 

My user has the administrator role.

I'm running core 8.6.7 and commerce 2.11.0
To solve this issue, I needed to add one payment method that is not "Offsite"

the error message is just very misleading.