Mark Wilkinson

This often happens when a Twitter App isn't a member of a project. Head to your [projects & apps overview page](https://developer.twitter.com/en/portal/projects-and-apps) - if your app appears under "Standalone Apps" you'll...

Ah sorry - I'm not affiliated with this library but I'd just had that problem myself recently, was a bit of a shot in the dark! On closer inspection it...