I have set the environment variables TWAUTH_APP_CONSUMER_KEY and TWAUTH_APP_CONSUMER_SECRET. App permissions are also set to Read and Write and Direct Message. The type of app is a Web App, Automated App, or Bot. The Callback URI / Redirect URL is http://127.0.0.1:5000/callback.

When running the program, I am able to retrieve values for oauth_denied, oauth_token, oauth_verifier, and oauth_store correctly. The browser also redirects to the Twitter authentication screen. However, upon returning to the application, an error occurs. I have tried adjusting the settings, but the issue persists.