In the future, strong authentication will no longer be possible with versions older than 5.5.0. However, payments can still be made using older versions. The problem can be resolved by updating the HSL app to the latest version.
The iOS 12 operating system will no longer be supported on the HSL app as of 1 June 2024. There is a possibility that the app can still be used with the iOS 12 operating system, but its functionality cannot be guaranteed.