The download version is missing a lot of images and it crashes.
EDIT:
I tried it on a different computer (same OS) and I can't replicate the problem, so somehow this is happening on my end. I do have an older game and that game does have the files being referenced in the errors--I believe the load feature is somehow looking in the wrong location for the saved game, and trying to load a saved game from an older game.
Edit 2:
OK, this is driving me nuts. I install the game into a new folder. I run the game, select my options, and when I have the option to recruit, I choose to save the game. I can't save, it gives me this error. It makes no sense. Why would the save feature even be looking for a graphic, let alone a graphic from a completely different game? I'm guessing there is some errant registry setting or something, but I'm not finding it. 
OK, so what I did is searched my system and found the file referenced:
So I copied all three folders into the Paradise Trail\www\img folder, and merged them with the existing ones.
Progress! I was able to save! But when I load the game, it shows saves from both The Singing Scar and Paradise Trail:
If I try to load the saves from The Singing Scar (Singalin) of course it fails with a map load error.
Wow so the game was trying to load the save file from another game? I guess the error makes sense, since it needs to show the character graphics on the save screen, and the other game had the graphics.
Paradise Trail was made with a pretty old version of RPG Maker MV. Maybe that issue is fixed in newer versions, and I need to update the scripts.