Title: Modern CSS with Tailwind: exception raised on image_pack_tag (page 4)

The text in the book about this helper leaves much to be desired:

<%= image_pack_tag(“media/images/music.svg”, size: “100x100”) %>

(For what it’s worth, image_pack_tag is a Rails and Webpacker thing; you may
need to do something else to find the image.)

Where should the image be found? Due to the exception I can’t see what image_pack_tag returns in the way of HTML. Do I need to change where the image is located? Do I need to change the url? Where is the media directory located?