unlimited sprint doesn't work for "Valley of the Zeke" Update. The new update was released in December. I know the devs own only the EPIC version here, but it also doesn't work for EPIC edition of the game (Valley of the Zeke update).
Please use the update notification system to report a game patch, update or to report that the trainer may not be working with the latest version of the game. If 3 or more reports have been filed, consider BOOSTING the priority of this title for a faster turnaround on the updated trainer.