kamefu won't run any files :(

[SonnHalter]

ok so i installed kamefu and got a mario.nes file. when i went to open it just says "an error occured when trying to open the following file: mario.nes"

how do i get the program to work!?

[cadash]

Kamefu it's kust a frontend and the emulators are not installed when you install this package so probably the error is caused because you have no NES emulators installed like ines or fceu