Please select Meta Application from the list and press Install button. It will redirect your to Meta login. After login please appruve requested Application Access Rights. This rights needs to connect your Facebook and Instagram messaging to NovaTalks/Nova.ChatsConnector.
Nova.ChatsConnector: NovaTalks and Nova.ChatsConnector Integration.
Other: For Testing purposes.
For properly working please add all requested rights to the Application.
Or please uninstall Application via Meta Business Integration Pages