Samsung one ui update broke an app

As the title says, a samsung tablet got updated, and now refuses to allow an older app that was working fine before the update to launch or do anything other than pop a toast saying it was built for an older android version.

While there are other app options, none are the right fit.

So, I'm hoping there's a way to make the app work anyway. It's the Swype keyboard.

Any help would be appreciated.