[ZTE Nubia Z17  Guides, News, & Discussion] rex2k1:
Just in case someone can help, this is the logcat trying to execute the Nubia Camera (copied and with 777 permissions in the system/priv-app, where is it in the Nubia ROM):

07-20 07:19:42.177 1537 2902 I ActivityManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.android.camera/.CameraLauncher (has extras)} from uid 10046 on display 0

07-20 07:19:42.243 1537 2907 I ActivityManager: Start proc 6037:com.android.camera/u0a102 for activity com.android.camera/.CameraLauncher

07-20 07:19:42.280 1424 1492 V audio_hw_primary: out_get_latency: Latency 8

07-20 07:19:42.300 1424 1492 V audio_hw_primary: out_get_latency: Latency 8

07-20 07:19:42.307 6037 6037 W System : ClassLoader referenced unknown path: /system/priv-app/Camera/lib/arm64

07-20 07:19:42.314 6037 6037 D AndroidRuntime: Shutting down VM

07-20 07:19:42.315 6037 6037 E AndroidRuntime: FATAL EXCEPTION: main

07-20 07:19:42.315 6037 6037 E AndroidRuntime: Process: com.android.camera, PID: 6037

07-20 07:19:42.315 6037 6037 E AndroidRuntime: java.lang.RuntimeException: Unable to instantiate application com.android.common.GalleryAppImpl: java.lang.ClassNotFoundException: Didn't find class "com.android.common.GalleryAppImpl" on path: DexPathList[[zip file "/system/priv-app/Camera/Camera.apk"],nativeLibraryDirectories=[/system/priv-app/Camera/lib/arm64, /system/fake-libs64, /system/priv-app/Camera/Camera.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64, /system/lib64, /vendor/lib64]]

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.LoadedApk.makeApplication(LoadedApk.java:802)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5472)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ActivityThread.-wrap2(ActivityThread.java)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1575)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.os.Handler.dispatchMessage(Handler.java:102)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.os.Looper.loop(Looper.java:154)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ActivityThread.main(ActivityThread.java:6236)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at java.lang.reflect.Method.invoke(Native Method)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:891)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:781)

07-20 07:19:42.315 6037 6037 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "com.android.common.GalleryAppImpl" on path: DexPathList[[zip file "/system/priv-app/Camera/Camera.apk"],nativeLibraryDirectories=[/system/priv-app/Camera/lib/arm64, /system/fake-libs64, /system/priv-app/Camera/Camera.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64, /system/lib64, /vendor/lib64]]

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at java.lang.ClassLoader.loadClass(ClassLoader.java:380)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at java.lang.ClassLoader.loadClass(ClassLoader.java:312)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.Instrumentation.newApplication(Instrumentation.java:993)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.LoadedApk.makeApplication(LoadedApk.java:796)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	... 9 more

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	Suppressed: java.io.IOException: No original dex files found for dex location /system/priv-app/Camera/Camera.apk

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexFile.openDexFileNative(Native Method)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexFile.openDexFile(DexFile.java:367)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexFile.<init>(DexFile.java:112)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexFile.<init>(DexFile.java:77)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexPathList.loadDexFile(DexPathList.java:359)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexPathList.makeElements(DexPathList.java:323)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexPathList.makeDexElements(DexPathList.java:263)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.DexPathList.<init>(DexPathList.java:126)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:48)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at com.android.internal.os.PathClassLoaderFactory.createClassLoader(PathClassLoaderFactory.java:43)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:58)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:520)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.LoadedApk.getClassLoader(LoadedApk.java:553)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ActivityThread.getTopLevelResources(ActivityThread.java:1900)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.LoadedApk.getResources(LoadedApk.java:766)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ContextImpl.<init>(ContextImpl.java:2038)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ContextImpl.createAppContext(ContextImpl.java:1983)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5389)

07-20 07:19:42.315 6037 6037 E AndroidRuntime:	... 8 more

07-20 07:19:42.316 1537 1560 W ActivityManager: Force finishing activity com.android.camera/.CameraLauncher

07-20 07:19:42.319 1537 1560 W ContextImpl: Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:877 com.android.server.am.AppErrors.crashApplicationInner:375 com.android.server.am.AppErrors.crashApplication:309 com.android.server.am.ActivityManagerService.handleApplicationCrashInner:13760 com.android.server.am.ActivityManagerService.handleApplicationCrash:13742

07-20 07:19:42.320 4274 4274 E AppCrashReceiver: com.android.camera stopped unexpectedly...

07-20 07:19:42.361 1537 4726 I OpenGLRenderer: Initialized EGL, version 1.4

07-20 07:19:42.361 1537 4726 D OpenGLRenderer: Swap behavior 1

07-20 07:19:42.819 1537 1573 W ActivityManager: Activity pause timeout for ActivityRecord{d63bb98 u0 com.android.camera/.CameraLauncher t162 f}

07-20 07:19:42.978 2935 2941 I art : Do full code cache collection, code=100KB, data=124KB

07-20 07:19:42.978 2935 2941 I art : Starting a blocking GC JitCodeCache

07-20 07:19:42.978 2935 2941 I art : After code cache collection, code=70KB, data=63KB

07-20 07:19:43.403 1537 1596 W WindowManager: Failed looking up window

07-20 07:19:43.403 1537 1596 W WindowManager: java.lang.IllegalArgumentException: Requested window android.view.ViewRootImpl$W@9a4f944 does not exist

07-20 07:19:43.403 1537 1596 W WindowManager:	at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:9484)

07-20 07:19:43.403 1537 1596 W WindowManager:	at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:9475)

07-20 07:19:43.403 1537 1596 W WindowManager:	at com.android.server.wm.WindowManagerService.removeWindow(WindowManagerService.java:2396)

07-20 07:19:43.403 1537 1596 W WindowManager:	at com.android.server.wm.Session.remove(Session.java:193)

07-20 07:19:43.403 1537 1596 W WindowManager:	at android.view.ViewRootImpl.dispatchDetachedFromWindow(ViewRootImpl.java:3290)

07-20 07:19:43.403 1537 1596 W WindowManager:	at android.view.ViewRootImpl.doDie(ViewRootImpl.java:5923)

07-20 07:19:43.403 1537 1596 W WindowManager:	at android.view.ViewRootImpl$ViewRootHandler.handleMessage(ViewRootImpl.java:3629)

07-20 07:19:43.403 1537 1596 W WindowManager:	at android.os.Handler.dispatchMessage(Handler.java:102)

07-20 07:19:43.403 1537 1596 W WindowManager:	at android.os.Looper.loop(Looper.java:154)

07-20 07:19:43.403 1537 1596 W WindowManager:	at android.os.HandlerThread.run(HandlerThread.java:61)

07-20 07:19:43.403 1537 1596 W WindowManager:	at com.android.server.ServiceThread.run(ServiceThread.java:46)