Hi Shopify Devs, I have a Theme App Extension that includes the following files: blocks/app-block.liquid blocks/app-embed.liquid blocks/shopify.theme.extension.toml Everything was working fine until today, but now deployment fails with the following validation errors: Version couldn’t …

[image] Liquid syntax error : Unknown tag 'schema' when running shopify app dev Shopify CLI and Libraries Hi folks - we’ve just shipped an update which should resolve this issue. Can you please check to see if this error is no longer appearing. Closing thi…

Deployment failing for Theme App Extension with schema tags in Liquid files

Extensions

Luke December 16, 2025, 2:05pm 2

Closing this

Topic		Replies	Views
Shopify Theme App Extension deploy fails with Liquid syntax error: Unknown tag 'schema' even though {% schema %} is valid Extensions theme-app-extension	2	184	December 16, 2025
Liquid Syntax Error: Unknown Tag ‘Schema' Extensions theme-app-extension	2	318	December 16, 2025
Liquid syntax error : Unknown tag 'schema' when running shopify app dev Shopify CLI and Libraries app-commands	181	5182	December 17, 2025
CLI 3.84.1+ Regression: "Unknown tag 'schema'" for app_block with require_remote_ui Shopify CLI and Libraries app-commands	3	406	December 16, 2025
Missing schema warning in snippets Extensions theme-app-extension	14	922	December 16, 2025

Deployment failing for Theme App Extension with schema tags in Liquid files

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