E008 - Position entries must be integers

Cause

A position: [x, y] entry contains a non-integer value (float, string, boolean, etc.). The deck grid uses integer cell coordinates only.

Example

{ slides: [{ id: "x", position: [0.5, 0], source: "x.slide.json" }] }

How to fix

Use integer grid coordinates: position: [1, 2].