As of April 3, 2023, you can no longer sign into Flipboard with Twitter.
Once a public square for ideas, Twitter is shutting off its API and closing its gates to other platforms, including Flipboard. Your Twitter feeds on Flipboard will be broken. You can look for replacement topic feeds by using search on Flipboard.
Moving forward, we encourage you to join us in the Fediverse. Read about our instance and integration here.