Mapbox gl import throw a 'Invalid source URL' error

[yfrommelt]

After generating my style with
python styler.py -t style_tpl.json -v voyager_vars.json -o voyager.json
when I try to import it on https://studio.mapbox.com/
I got Invalid source URL.

[klokan]

Perhaps because the styles are using OpenMapTiles?
https://openmaptiles.org/

You can get a hosted version (TileJSON endpoint for style Source) with a free account at https://cloud.maptiler.com/tiles/v3/