Hi there,
I'd love to use the app "ch.antavi.zf" from the Play store. While installing and opening works, it doesn't show the expected content. To verify that this app isn't broken per se, I installed it on another Android device and it worked just fine.
To get a feeling what's going on, I fired up "adb logcat" and found a few suspects:
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: failed creating starting window content at taskId: 6434
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: android.content.res.Resources$NotFoundException: Drawable ch.antavi.zf:drawable/launch_background with resource ID #0x7f070072
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: Caused by: android.content.res.Resources$NotFoundException: File res/bM.xml from drawable resource ID #0x7f070072
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:879)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl.java:673)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.res.Resources.loadDrawable(Resources.java:1002)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.res.Resources.getDrawableForDensity(Resources.java:992)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.res.Resources.getDrawable(Resources.java:931)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.Context.getDrawable(Context.java:810)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at com.android.wm.shell.startingsurface.SplashscreenContentDrawer.peekWindowBGColor(SplashscreenContentDrawer.java:24)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at com.android.wm.shell.startingsurface.SplashscreenContentDrawer$$ExternalSyntheticLambda7.getAsInt(R8$$SyntheticClass:6)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at com.android.wm.shell.startingsurface.SplashscreenContentDrawer.getBGColorFromCache(SplashscreenContentDrawer.java:57)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at com.android.wm.shell.startingsurface.SplashscreenContentDrawer.makeSplashScreenContentView(SplashscreenContentDrawer.java:180)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at com.android.wm.shell.startingsurface.SplashscreenContentDrawer$$ExternalSyntheticLambda1.run(R8$$SyntheticClass:22)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.os.Handler.handleCallback(Handler.java:942)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.os.Handler.dispatchMessage(Handler.java:99)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.os.Looper.loopOnce(Looper.java:201)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.os.Looper.loop(Looper.java:288)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.os.HandlerThread.run(HandlerThread.java:67)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #10: <bitmap> requires a valid 'src' attribute
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.BitmapDrawable.updateStateFromTypedArray(BitmapDrawable.java:854)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.BitmapDrawable.inflate(BitmapDrawable.java:775)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.DrawableInflater.inflateFromXmlForDensity(DrawableInflater.java:141)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.Drawable.createFromXmlInnerForDensity(Drawable.java:1394)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:1384)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.LayerDrawable.inflateLayers(LayerDrawable.java:285)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.LayerDrawable.inflate(LayerDrawable.java:200)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.DrawableInflater.inflateFromXmlForDensity(DrawableInflater.java:141)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.Drawable.createFromXmlInnerForDensity(Drawable.java:1394)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.graphics.drawable.Drawable.createFromXmlForDensity(Drawable.java:1355)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.res.ResourcesImpl.loadXmlDrawable(ResourcesImpl.java:911)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:865)
07-07 20:45:36.565  2843  2968 W ShellStartingWindow: 	... 15 more
...
07-07 20:45:36.583 14721 14721 W Zygote  : Can't access app profile directory: /data_mirror/cur_profiles/0/ch.antavi.zf
...
07-07 20:45:37.731  1663  2757 D MultiInternetWifiNetworkFactory: got request NetworkRequest [ REQUEST id=902, [ Capabilities: INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VCN_MANAGED Uid: 10265 RequestorUid: 10265 RequestorPkg: ch.antavi.zf UnderlyingNetworks: Null] ]
07-07 20:45:37.741 14721 14845 D TrafficStats: tagSocket(121) with statsTag=0xffffffff, statsUid=-1
07-07 20:45:37.745 14721 14850 D TrafficStats: tagSocket(129) with statsTag=0xffffffff, statsUid=-1
07-07 20:45:37.763  3806 14638 W Conscrypt: Could not set socket write timeout: java.net.SocketException: Socket closed
07-07 20:45:37.763  3806 14638 W Conscrypt: 	at com.google.android.gms.org.conscrypt.Platform.setSocketWriteTimeout(:com.google.android.gms@232414044@23.24.14 (190400-544099984):2)
07-07 20:45:37.763  3806 14638 W Conscrypt: 	at com.google.android.gms.org.conscrypt.ConscryptFileDescriptorSocket.setSoWriteTimeout(:com.google.android.gms@232414044@23.24.14 (190400-544099984):0)
...
07-07 20:45:39.624 14721 14811 W Firestore: (24.6.0) [Firestore]: Listen for Query(target=Query(ch.antavi.zf/app/feeds_low_frequency order by -ts, -__name__);limitType=LIMIT_TO_FIRST) failed: j1{code=PERMISSION_DENIED, description=Missing or insufficient permissions., cause=null}
07-07 20:45:39.626 14721 14811 W Firestore: (24.6.0) [Firestore]: Listen for Query(target=Query(ch.antavi.zf/app/feeds order by -ts, -__name__);limitType=LIMIT_TO_FIRST) failed: j1{code=PERMISSION_DENIED, description=Missing or insufficient permissions., cause=null}
...
07-07 20:45:40.558 14721 14767 E flutter : [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [cloud_firestore/permission-denied] The caller does not have permission to execute the specified operation.
07-07 20:45:40.558 14721 14767 E flutter : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
07-07 20:45:40.558 14721 14767 E flutter : pid: 14721, tid: 14767, name 1.ui
07-07 20:45:40.558 14721 14767 E flutter : os: android arch: arm64 comp: yes sim: no
07-07 20:45:40.558 14721 14767 E flutter : build_id: '349b9003a215a0b2af40333af6ac62d6'
07-07 20:45:40.558 14721 14767 E flutter : isolate_dso_base: 5d42a22000, vm_dso_base: 5d42a22000
07-07 20:45:40.558 14721 14767 E flutter : isolate_instructions: 5d42c17d00, vm_instructions: 5d42c12000
07-07 20:45:40.558 14721 14767 E flutter :     #00 abs 0000005d4308b917 virt 0000000000669917 _kDartIsolateSnapshotInstructions+0x473c17
07-07 20:45:40.558 14721 14767 E flutter :     #01 abs 0000005d430e0ddb virt 00000000006beddb _kDartIsolateSnapshotInstructions+0x4c90db
07-07 20:45:40.558 14721 14767 E flutter :     #02 abs 0000005d430c3f63 virt 00000000006a1f63 _kDartIsolateSnapshotInstructions+0x4ac263
07-07 20:45:40.558 14721 14767 E flutter :     #03 abs 0000005d42c3925f virt 000000000021725f _kDartIsolateSnapshotInstructions+0x2155f
07-07 20:45:40.558 14721 14767 E flutter :     #04 abs 0000005d430d4773 virt 00000000006b2773 _kDartIsolateSnapshotInstructions+0x4bca73
07-07 20:45:40.558 14721 14767 E flutter :     #05 abs 0000005d42c350df virt 00000000002130df _kDartIsolateSnapshotInstructions+0x1d3df
07-07 20:45:40.558 14721 14767 E flutter :     #06 abs 0000005d42c363df virt 00000000002143df _kDartIsolateSnapshotInstructions+0x1e6df
07-07 20:45:40.558 14721 14767 E flutter :     #07 abs 0000005d42c3634b virt 000000000021434b _kDartIsolateSnapshotInstructions+0x1e64b
07-07 20:45:40.558 14721 14767 E flutter :     #08 abs 0000005d42c35b43 virt 0000000000213b43 _kDartIsolateSnapshotInstructions+0x1de43
07-07 20:45:40.558 14721 14767 E flutter :     #09 abs 0000005d430d33c7 virt 00000000006b13c7 _kDartIsolateSnapshotInstructions+0x4bb6c7
07-07 20:45:40.558 14721 14767 E flutter :     #10 abs 0000005d42c35ab3 virt 0000000000213ab3 _kDartIsolateSnapshotInstructions+0x1ddb3
07-07 20:45:40.558 14721 14767 E flutter :
I also played around with the compatibility settings, but to no success.
Screenshots of how it looks like: https://imgur.com/a/kEmvAt8