General
=======
-Why am I encountering a 401 Unauthorized error?
------------------------------------------------
+Why am I encountering a 401 Unauthorized error with :class:`API` or 403 Forbidden error with :class:`Client`?
+-------------------------------------------------------------------------------------------------------------
If you're using a method that performs an action on behalf of the
authenticating user, e.g. :meth:`API.update_status`, make sure your app has the
.. _Twitter's API documentation on app permissions: https://developer.twitter.com/en/docs/apps/app-permissions
-Why am I encountering a 403 Forbidden error?
---------------------------------------------
+Why am I encountering a 403 Forbidden error with :class:`API`?
+--------------------------------------------------------------
If you have Essential access to the Twitter API, you won't be able to access
Twitter API v1.1. This includes all :class:`API` methods and :class:`Stream`.