When attempting to sign on to Twitter from the LO2 UI on a fresh browser, instead of the Twitter app sign-in page, this results in the following error message displayed by the browser:
"data": "<?xml version=\"1.0\" encoding=\"UTF-8\"?><errors><error code=\"415\">Callback URL not approved for this client application. Approved callback URLs can be adjusted in your application settings</error></errors>"
This is related to this announcement from Twitter:
Action REQUIRED - Sign in with Twitter users must whitelist callback URLshttps://twittercommunity.com/t/action-required-sign-in-with-twitter-users-must-whitelist-callback-urls/105342