Hi Harshraj,
How do you have your Mendix for private cloud setup on AWS, do you have your Mendix for private cloud license configured.
https://docs.mendix.com/developerportal/deploy/private-cloud/#licensing
If you are running your own pipelines for deployment, you can provide the license ID and key as environment variables to your application, see documentation: https://docs.mendix.com/developerportal/deploy/licensing-apps-outside-mxcloud/#36-docker
If you are using the Mendix for Private Cloud solution, you should be able to provide the license in the portal for online apps (https://privatecloud.mendixcloud.com/). Go to the details of an app and scroll down on the General tab: