New sign ins to LO2 impossible because a change in Twitter's Sign in with Twitter service.

[Omar Vasquez Lima]

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:

{
    "statusCode": 403,
    "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 URLs
https://twittercommunity.com/t/action-required-sign-in-with-twitter-users-must-whitelist-callback-urls/105342

[Dave Winer]

Thanks for the report. I just updated the app settings and tried it here and it worked.

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[Omar Vasquez Lima]

Worked here too, setting up LO2 on my new Mac, thanks again.