hi, i goto http s://twitter.com/i/oauth2/authorize?state=my-state&code_challenge=challenge&&scope=tweet.read%20users.read%20offline.access&response_type=code&redirect_uri=https%3A%2F%2Fwww.swapx.site%2Fcallback&code_challenge_method=plain

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anyone can help me?

Are you sure the callback URL is in the whitelist in your app settings? Look for “Callback URI / Redirect URL” there and make sure https://www.swapx.site/callback is listed in there.

yes, sir.In the whitelist