I am using one license for development server and its working fine.
I created another web application and restore the backup from another SharePoint environment, that farm also using Plumsail . SharePoint, Plumsail and SQL are using Same Versions.
But newly configured web application Plumsail is not working and giving license error.
License file is copied to IIS Folder,
App site collection is configured and App is deployed successfully, without any errors,
Plumsail Site-Collection feature is activated.
Restarted the server
but no effect , and its giving below error, only newly created sitecollection in New Webapplication is not working