We apologise for any inconvenience caused to developers and users who have been using the Swift and Flutter SDK. Yesterday, we released new versions of both SDKs - 3.1.5 for Flutter and 7.5.1 for Swift, which has resolved the issue of users being unable to log in.
We recommend upgrading both SDKs to the latest version.
Related community issue: Fail to login on Mobile
SDK releases
Swift SDK: 7.5.1
Flutter SDK: 3.1.5
Thanks for your patience.