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 It should have run the app locally A…

Thanks everyone for chiming in and sharing additional context. This issue has now been mitigated, so you should no longer see this error. If you’re still running into it, please let us know.

Also seeing the same issue. I’m convinced this is a validation issue on Shopify’s side. Our TOML has not changed and dev was working fine yesterday.

I have the same issue does any one found a solutions?

Same error, different setup — wanted to add data points in case it helps narrow the trigger. My setup: @shopify/cli@3.90.1 (pinned ~3.90.0 after upgrading from ^3.91.1 hoping to dodge the issue — same error on both) @shopify/shopify_function@2.0.1 (in extensions/cart-transformer/) @shopify/shopif…

I had the same issue, but I had a quite old shopify cli version. I upgraded to 3.94.3, not the latest (because we still haven’t updated our project to node22) and it stopped happening. Maybe something in the shopify cli 3.94.3 version prevents the error from happening, or it might be something com…

Same issue here. CLI version 3.92.1 Was working 1-2 days ago, error today.

I face the same issue App configuration is not valid Validation errors in shopify.app.myapp.toml: [definitions]: Required 2 days ago it worked well, but now can’t run “Shopify app dev”. How to fix it?

If anyone is still encountering this issue after updating to CLI version 4.2.0, please let us know.

Its fixed in 4.2.0. Thanks for the prompt resolution.

@Paige-Shopify Will this issue be fixed for earlier versions, or do we need to be upgraded to version 4.2.0?

Getting error: Validation errors in shopify.app.toml:

Shopify CLI and Libraries

remy727 June 21, 2026, 4:14pm 12

Looks like this is duplicated issue of Shopify cli error.

I had the same error, and updating the CLI to 4.2.0 resolved it for me.

Topic		Replies	Views
App configuration is not valid: [definitions]: Required — org-specific, affects all CLI versions Shopify CLI and Libraries app-commands	1	56	June 23, 2026
Error "App configuration is not valid • []: Invalid input" when testing payments_extension with `shopify app dev` Extensions checkout-ui-ext	3	231	May 4, 2025
Shopify cli error Shopify CLI and Libraries app-commands	4	167	June 20, 2026
[Feature Request] Shopify app validate Dev Platform cli	1	37	July 31, 2026
Shopify app deploy fails with "At least one specification (.toml OR .json) file is required" on CLI 3.84.2 Shopify CLI and Libraries app-commands	12	1589	April 6, 2026

Getting error: Validation errors in shopify.app.toml:

Related topics