Same issue here. Can’t run dev server
Same issue.
On another thread a user posted a simple repro:
shopify app init
// choose Build a React Router app (recommended)
// choose TypeScript
// choose organization
// choose “Yes, create it as a new app”
cd app_folder/
shopify app generate extension
// choose “Theme app extension”
shopify app dev
// => error: [blocks/star_rating.liquid] Liquid syntax error (line 11): Unknown tag ‘schema’
node v22.15.0
shopify/cli v3.88.1
I’ve tried downgrading node and/or shopify cli but neither fix it.
Hi, I’m also facing the same Liquid syntax error: Unknown tag 'schema' issue when running shopify app dev. Please let me know if there’s any update or workaround. Thanks!
Same issue
Can’t run dev server
updated packages and cli
still no good
+1, unable to run the app in development mode or deploy new versions.
Same problem, cant run dev mode or deploy new version, get [blocks/form-embed.liquid] Liquid syntax error (line 7): Unknown tag ‘schema’
Let’s wait for a patch. I’ve read that the schema tag could only be used within /sections but theme extension only allows:
- assets
- blocks
- snippets
- locales
directories. I tried to convert the block that is throwing the error into a section and I got this new error:
Me and my friend ripjawe are also experiencing this issue
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Having same issue here.
I bypass this checking by remove the embed app block then run app then revert the embed app block. Use that trick to run your app and wait for Shopify to fix this issue.
i got the same issue too
Succeed with this work aground if we’re working admin app. Thank Harry.
I can run app by simply removing the extension but if revert back it will again show error. And I need to work on extension part.
Anyone??
Facing this same issue.
Facing this same issue.
Facing this same issue.
I’m facing the same Liquid syntax error — “Unknown tag ‘schema’” — when running shopify app dev. Because of this issue, I’m unable to run the dev server or deploy the app.
same issue, it was working fine yesterday but not working today. i hope shopify fix this asap
Same issue, was working yesterday, and now it just throws error on the build, not able to test any extension or anything

