[com.mcdonalds.mobileapp] Fails to launch after selecting region with U1 error

Affected app
Name: McDonald's
Package id: com.mcdonalds.mobileapp

Describe the bug
Unable to launch into app, errors out with U1 error after selecting region.
When the error appears on screen, the following is printed in the logs:

26369 26369 W 🥔🟠: Error caught in RevolverViewModel MarketPickerViewModel
26369 26369 W 🥔🟠: com.mcdonalds.core.errors.KmmException: Unsupported response error response code in PlexureCommonErrorResponse(error=Market id is not set for consumer market update, errorCode=, errorDescription=null, innerException=null)
26369 26369 W 🥔🟠:  at com.mcdonalds.repository.account.datasources.AccountPlexureDataSourceImpl.changeMarket(Unknown Source:296)
26369 26369 W 🥔🟠:  at com.g5.invokeSuspend(Unknown Source:12)
26369 26369 W 🥔🟠:  at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(Unknown Source:10)
26369 26369 W 🥔🟠:  at kotlinx.coroutines.DispatchedTask.run(Unknown Source:125)
26369 26369 W 🥔🟠:  at android.os.Handler.handleCallback(Handler.java:991)
26369 26369 W 🥔🟠:  at android.os.Handler.dispatchMessage(Handler.java:102)
26369 26369 W 🥔🟠:  at android.os.Looper.loopOnce(Looper.java:232)
26369 26369 W 🥔🟠:  at android.os.Looper.loop(Looper.java:317)
26369 26369 W 🥔🟠:  at android.app.ActivityThread.main(ActivityThread.java:8787)
26369 26369 W 🥔🟠:  at java.lang.reflect.Method.invoke(Native Method)
26369 26369 W 🥔🟠:  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:594)
26369 26369 W 🥔🟠:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:871)
26369 26369 D 🥔🔵: RevolverViewModel MarketPickerViewModel emitting state GenericError

To Reproduce
Steps to reproduce the behavior:

1. Download McDonald's app
2. Select your region
3. Click "Next"
4. After a few seconds, an U1 error appears

Expected behavior
Normally launch into app to use coupons

Screenshots
Screenshot of the error:

Screenshot of integrity checks:

System
Android Version: 15
Custom ROM: crDroid 11.2

microG
microG Core version: 0.3.6.244735
microG Self-Check results: All ticked

Additional context
I use Play Integrity Fix 18.7, Tricky Store 1.2.1 and have normal Google Play Store 45.2.19-31 installed and working. I pass all integrity checks. I already tried clearing data, setting all permissions, using older versions of McDonald's app, using "Hide my applist" to hide other apps, etc. I noticed this string in adb logcat after setting the region

Finsky  : [1638] wai.a(185): Encountered exception whilst fetching from GMS, deferring to Finsky: com.google.android.gms.common.api.ApiException: 17: API: IntegrityApiDisplayListener.API is not available on this device. Connection failed with: ConnectionResult{statusCode=API_DISABLED, resolution=null, message=null}

however, I don't know if it's related to the error, as this same string appears when using integrity check apps.

Start by reproducing the region-selection flow in the McDonald's app on Android 15 and capture adb logcat around AccountPlexureDataSourceImpl.changeMarket and IntegrityApiDisplayListener.API. The issue names no GmsCore file or test, so compare the U1 failure and API_DISABLED logs with the Play Services compatibility code; done means the app launches after region selection without the U1 error.