[Bug] Code App crashes in Power Apps mobile (iOS) with "platformSpecificResourcesVersion" undefined

[JustinSRao]

Describe the bug

A deployed Code App that previously worked (worked last Friday, now it is Monday) in the Power Apps iOS mobile app now fails to load
with the error "This app didn't install correctly" and the JS error:
Undefined is not an object (evaluating 't.platformSpecificResourcesVersion')

The app loads fine when opened via direct URL in Safari on web and mobile. The issue is specific to the
Power Apps mobile app on iPhone.

Steps to Reproduce

1. Deploy a Code App via pac code push or npm run deploy
2. Open the Power Apps mobile app on iPhone
3. Tap the app tile to launch it

Expected behavior

The Code App loads and runs inside the Power Apps mobile app, as it did previously.

Actual behavior

The app fails immediately with:
"This app isn't opening correctly. This app didn't install correctly. Please try again.
Undefined is not an object (evaluating 't.platformSpecificResourcesVersion')"

A new Session ID is generated on each attempt, confirming the app is not cached —
it is failing fresh on every load from the server.

Screenshots or Error Messages

This app isn't opening correctly
This app didn't install correctly. Please try again.
Undefined is not an object (evaluating 't.platformSpecificResourcesVersion')
Session ID: 3e8c2627-ff53-49f6-a237-c189e871d7cc

Environment information

• Framework, build tool or relevant package used: React 19, Vite 8, TypeScript
• @microsoft/power-apps: 1.2.2
• @microsoft/power-apps-vite: 1.0.2
• Deployed via: pac code push
• Device: iPhone, Power Apps iOS mobile app
• No connections or data sources configured (connectionReferences: {}, databaseReferences: {})

Additional context

The app worked in the Power Apps iOS mobile app as recently as last week on June 12th.
No changes were made to the app code or deployment between when it worked and when it broke.
Redeploying with updated packages (@microsoft/power-apps@latest, @microsoft/power-apps-vite@latest)
did not resolve the issue. The same app opens correctly in Safari on the same device using
the direct play URL, suggesting the issue is in the mobile player itself rather than the app bundle.

[eschavez]

Thanks for the detailed report. We can reproduce the pattern here - the app loading fine in the browser (Safari direct URL) but failing in the Power Apps mobile host is a strong signal that this is a regression in the mobile player itself rather than anything in your app bundle or the Code Apps SDK.

The platformSpecificResourcesVersion property is accessed by the mobile host when it initializes the app container. When it is undefined, the host throws before your app code even runs, which matches your observation that a fresh session ID is generated on every attempt (nothing is being cached or executed).

We are investigating when this regression was introduced on the mobile player side. A few things that would help us correlate:

1. Power Apps mobile app version - go to Settings > About in the iOS app and share the version number.
2. Tenant/environment - is this in a commercial cloud tenant? GCC or sovereign cloud environments may see mobile player updates at different cadences.
3. Other Code Apps - do other Code Apps in the same environment fail the same way, or is this specific to one app?

We will update this issue once we have identified the root cause and have a timeline for a fix.