My account is not activated, also, I get a screen to verify my mail, but it is already verified.
I’d double check that because as far as i remember, dev account email verification was separate to normal twitter account email verification. Sometimes those emails get spam binned.
+1 to this.
Please make sure you are checking the email address that was associated with your @handle at the time that you applied.
If you can’t find this email, you can request a new one at https://developer.twitter.com/en/verify