Must open a file first to save with castle crashers

I don’t know how to open a file to save on with castle crashers mods also its keeps telling me theres an error and if I click continue it will just ignore it which I also don’t know how to fix plz help.

The Castle Crashers mods are done through editing your profile which is why the editor is listed in Profile Mods in Horizon. You will need to move your profile to a flash drive and then try again.