[REST API] "Grant promotional" retruns Error with "Not Found"

Hi

I’m trying to grant promotional with REST API.（https://api.revenuecat.com/v1/subscribers/{app_user_id}/entitlements/{entitlement_identifier}/promotional）

docs: https://www.revenuecat.com/docs/api-v1#tag/entitlements

But I received error with 404.

[raw error message]

{status: 404, statusText: 'Not Found', headers: AxiosHeaders, config: {…}, request: ClientRequest, …}

What could be the cause of this error?

[Already Confirmed Topics]

• User exists in project (with `https://api.revenuecat.com/v1/subscribers/{app_user_id}`)
• Entitlement exists in project (with `https://api.revenuecat.com/v2/projects/{project_id}/entitlements/{entitlement_id}`)
• Path is valid (A generic "Page not found" error message appears when adding an unnecessary character to a path.)
• The error does not occur only with a specific user.
• The error does not occur only with a specific entitlement.