E505 - Slide source file not found

Cause

A slide entry's source: path (or a *_file: field inside an element, like markdown_file: or iframe_html_file:) points at a file that doesn't exist on disk.

Example

{ slides: [{ id: "x", position: [0, 0], source: "missing.slide.json" }] }

How to fix

Create the file, or correct the path. Slide source paths are relative to the deck's .deck.json directory; element *_file: paths are relative to the slide's .slide.json directory.