We looked into the save and found the bug. Good news: you can continue!
On game day (of your own games) in the relegation, please use the "play" button for your game on the league schedule screen. After you played (or simulated) your game, just continue the days normally until your next game.
This only effects your games in the Mestis -> Liiga relegation, everywhere else you can proceed normally.
Thanks for reporting it, we will fix this for FHM 4.