I am trying to use Teams new Developer portal (previously using App studio) to debug my custom application which includes a custom tab and a bot. When I try to debug the app using "Preview in Teams" button , it opens up a dialog which says "Manifest parsing has failed" and when I close the dialog it shows a message in the developer portal "App does not have the required permissions for this operation".
The validation checker doesn't show any error message. I have attached the screenshot here as well. Any help would be appreciated.
Thanks in advance!!