Rest call failed with client error in Source ADF , status code 401 Unauthorized with Service bus in Azure Cloud

Question

Hi,

Trying to post a JSON message to Service bus queue via ADF REST API call but ended up the following error message. The ADF has the service bus owner and sender roles. ADF and service bus are in different virtual networks (West US and West US2) in the same subscription and resource group and private endpoints are enabled for both resources. Virtual network IP CIDR is also whitelisted in Service bus.

Thank you.