Yea, I’m facing same issue with product fetching.
Devs are having this issue since past 9 hours! and still not fixed. 
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What is actually shopify doing? 9 hours passed and still not resolved the issue. This is insane.
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I’m fortunately still developing my app. For those of you who have an app in production, how are you doing? Is your app down?
I’ve checked on the production. It’s live so far.
Yes sir, all apps are down
app deployed yesterday are working fine.
Issue still going on?
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Still happening for me, adding this reply so I can see when it is fixed (hopefully soon!)
claude pointed me here lol… same issue - following to know when resolved
Shopify team…. clients are waiting for the fix.. please do it asap 
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Same issue here. Tried the following:
- Downgrading to multiple different versions (3.88.0, 3.87.4)
- Creating a fresh scaffold (react router, extension only)
- Creating/running on multiple devices (MacOS, Windows)
- Disabling theme check with a theme-check.yml file
- Trying to disable theme check with an env var
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If app is deployed already those are working fine. Just you cannot build or deploy new versions or new apps.
Any update for this issue guys? Still cannot deploy and Shopify app dev right?
Hi folks,
We’re deploying a fix for this currently. Will update once it’s been fully released.
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We are experiencing the same issue while deploying the app. Because of this error, we are unable to deploy the application.Could you please guide us on how to resolve this issue?
Waiting is the solution atm.
Hello @Liam-Shopify ,
I was trying to fix this issue from morning… from chatGPT suggestion they told me to change shopify.extension.toml > shopify.extension.yml and i did same thing and then i tried to deploy. it works but sudden theme app extention is detached(Deleted) from all the stores. this is very serious issue for me !!! :((
is there any way to get back and attach to every store ?
Looking forwards your answer