No source with this id exists in the style.
The source is not a tile source (geojson, image, video, …).
The source addresses tiles only through a TileJSON url, which a region does not serve.
The source carries both url and tiles; which one MapLibre uses is not ours to decide.
The source has no single tile template to replace.
The template is not a plain {z}/{x}/{y} address.
The template already addresses the offline scheme.