Cannot get Subscription Status from API v2

Hello! 
Here’s the api url: https://api.revenuecat.com/v2/projects/${PROJECT_ID}/customers/${CUSTOMER_ID}/subscriptions

Correctly Added header:
 

headers: {

'Authorization': `Bearer ${AUTHORIZATION_TOKEN}`,

'Content-Type': 'application/json'

}
Here’s the response:
{
    "items": �],
    "next_page": null,
    "object": "list",
    "url": "https://api.revenuecat.com/v2/projects/XXXXX/customers/$RCAnonymousID:0ee378058790XXXXXXXXXXXX/subscriptions"
}

Customer has Yearly ACTIVE Subscription in Production. Could you please help how to retrieve Subscription items?

Thanks!