I have reproduced the issue on the latest CLI version. Yes, I am on the latest version I have searched existing posts and this report is not a duplicate. Yes, this isn’t a duplicate In which of these areas are you experiencing a problem? App Expected behavior The Shopify CLI should successfully p…

[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.

CLI 3.84.1+ Regression: "Unknown tag 'schema'" for app_block with require_remote_ui

Shopify CLI and Libraries

james_collins December 16, 2025, 6:46am 2

This is likely caused by this issue: Liquid syntax error : Unknown tag 'schema' when running shopify app dev

Topic		Replies	Views
Liquid syntax error : Unknown tag 'schema' when running shopify app dev Shopify CLI and Libraries app-commands	182	3481	December 17, 2025
Shopify Theme App Extension deploy fails with Liquid syntax error: Unknown tag 'schema' even though {% schema %} is valid Extensions theme-app-extension	3	153	December 16, 2025
Deployment failing for Theme App Extension with schema tags in Liquid files Extensions checkout-ui-ext , theme-app-extension	2	89	December 16, 2025
Missing schema warning in snippets Extensions theme-app-extension	15	740	December 16, 2025
Liquid Syntax Error: Unknown Tag ‘Schema' Extensions theme-app-extension	3	286	December 16, 2025

CLI 3.84.1+ Regression: "Unknown tag 'schema'" for app_block with require_remote_ui

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