Frontegg supports SDK versions released within the last 2 years. Older versions are not tested or supported, and they may stop working as the Frontegg platform evolves.
To keep your application secure and stable, upgrade to the latest version of each Frontegg SDK you use, and update regularly. If you are on a version older than 2 years, upgrade as soon as possible. Each SDK publishes release notes with every new version, so you can review changes before you upgrade.