So not the gamepass one? if you search killer instinct it shows just 2 items, the game and the hub but when you load hub up and you go thru menu to play it brings you to the one that doesnt work.
Put that in the report,
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.
Trainer error: "Cannot find game"
Game: Killer Instinct
Store: Windows Store
Version: 3.9.13.0
Have tried these suggested solutions.
"I have disabled/uninstalled all antivirus, firewall and other security apps including browser addons and extensions.
I have right clicked "Run as Administrator" on the trainer and game.
I have tried running the trainer, running the game, alt-tabbing to trainer and pressing F1 to activate and then alt-tabbing back to game to use options."
2. Killer Instinct Trainer (WINDOWS STORE 06.15.2019)