E299 - Pydantic schema violation in slide source

Cause

Pydantic detected a schema violation in a slide source file that doesn't fall under one of the more specific E2xx (slide-level) or E3xx (element-level) codes. This is the umbrella for any Pydantic-internal ValidationError raised while loading a .slide.json — including wrong-type fields, unknown extra fields, and missing nested required fields on any element.

Example

A field type-mismatch flagged by Pydantic, with the original field path embedded in the error message.

How to fix

Read the embedded Pydantic message — it names the field path and the constraint that failed. Cross-reference with scrolly schema file slide for the expected schema of the slide source.