Skip to main content

One post tagged with "Theme Development"

View all tags

Fix WordPress FSE Pattern Block Validation Errors - 5 Common Causes

· 4 min read
CCLEE
CCLEE

Encountered frequent Block Pattern validation failures while developing a WordPress FSE theme for a client. This article summarizes 5 common causes and solutions.

TL;DR​

Block validation failures are usually caused by one of: undefined color slugs, duplicate JSON keys, Style Variation palette override, HTML attribute mismatch with block comments, or global styles overriding theme.json. Check each one systematically.