Both on the LIVE and the SANDBOX environment I get the error RESOURCE_NOT_FOUND when I get the order details (/v2/checkout/orders/{id}).

As orderId, I use the id that I got back from the webhook Payment Sale Completed JSON-data from PayPal with JSON-path resource.id.

Question 1: Can I use this id as OrderId in this API endpoint?

Last year, this was working in most cases: I got the order details with a GET-request https://api.sandbox.paypal.com/v2/checkout/orders/{resource.id}. But from 2020 on, this is not working anymore, both in LIVE and SANDBOX environment.

Question 2: Is there something changed in the API that is not documented?