in your feed there are three consistent errors:
Thumbnails:
"thumbnail": "http://roku.joystar.tv/",
There are no thumbnails actually defined. You are just calling a path not an actual file. Subsequently you will fail the 800x450 minimum requirement as well (because the picture isn't defined)
Url:
"url": "http://roku.joystar.tv/",
Same as Thumbnails, url is missing the actual file. Right now it is just a path.
Genres:
"genres": ["faith", ""],
You are calling a second genre but the genre is blank. Chang it to "genres": ["faith"], and you should be fine.