I am trying to establish a connection between Salesforce and Heroku to perform CRUD operations via External Objects. For this, I created one app in Heroku : https://testwithsfconnect.herokuapp.com/
While I am trying to validate and sync, I am getting this error : "This data isn't available because the associated table in the external data source can't be found. Contact your administrator for help. Attempted query URL: https://testwithsfconnect.herokuapp.com/$metadata"