First parameter must be Steam AppId or Steam GameId

Hello there!

I'm trying to run a game (resident evil 2) along with a trainer so I can make up for lost progress

But I keep getting this output when I try:

[daniel@daniel-pc O]$ /run/media/daniel/O/proton-exec 883710 /run/media/daniel/O/RE2RUTrainer.exe USAGE: /run/media/daniel/O/proton-exec <AppId/GameId> [Parameters] First parameter must be Steam AppId or Steam GameId.