Can't install cutom sprite files

[Ajiro3]

Maputnik version: v1.7.0
Browser: Chrome
OS:< Windows

Description of the bug:
I specified the sprite files (json and png) stored on my GitHub in the style.json as follows;
"sprite": "https://ajiro3.github.io/Ajiro3.github.io-tokyo/sprites/jorudan3x",
But the icons are not shown on the map.
osm_Git-jorudan3.zip

Style file or style URL:

Screenshots:

[HarelM]

@Ajiro3 is this still an issue or can this issue be closed?

[Ajiro3]

Hi, it's not resolved, still open.

[HarelM]

What exactly isn't working?
I see icons on the map:

Please try and create a more simplified style, source, and please specify the location to look in, I'm having a hard time understanding what isn't working...