E305 - image_sequence needs at least 2 entries

Cause

An image_sequence element has fewer than 2 frames. The element type exists to crossfade between successive frames, so a single-frame sequence is meaningless.

Example

{ image_sequence: ["a.png"], frame_distance: 100, hold: 50 }

How to fix

Add more frames to the sequence, or replace the element with a plain image: element if a single frame is all you need.