I am developing a custom app intended to be used exclusively for my store to automatically create orders based on input data. The necessary permissions (read_orders and write_orders) have been granted. POST requests to another elevated permissions endpoints (POST Products and even GET Orders) return as expected, creating a product and returning a list of orders respectively. However, trying to make a POST Orders request with valid headers (content-type and x-shopify-access-token set to “application/json” and my access token respectively) always returns a 403 with a following body
{
"errors": "Service is unavailable."
}
The error message indicates a problem on the Shopify side, however in such case I’d expect the error code to be in the 5xx range.
Thank you in advance.