[Nexus 5 Q&A, Help & Troubleshooting] tcat007:
I was on KK and flashed Foxhound (L). Decided to go back to KK, so flashed TWRP back up. Everything except one app is working fine. "Parcel back up and restore" force closes after getting granted su permission. All my app backups are on my SD card, which I don't really need, but I would like the app to start working again. Log if anyone knows how to read it, I think the line "Requires newer sdk version #21 (current version is #19)" could be the issue.

Enabling debug mode 0

11-18 17:47:51.380 D/AndroidRuntime( 7328):

11-18 17:47:51.380 D/AndroidRuntime( 7328): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<

11-18 17:47:51.380 D/AndroidRuntime( 7328): CheckJNI is OFF

11-18 17:47:51.390 D/dalvikvm( 7328): Trying to load lib libjavacore.so 0x0

11-18 17:47:51.390 D/dalvikvm( 7328): Added shared lib libjavacore.so 0x0

11-18 17:47:51.400 D/dalvikvm( 7328): Trying to load lib libnativehelper.so 0x0

11-18 17:47:51.400 D/dalvikvm( 7328): Added shared lib libnativehelper.so 0x0

11-18 17:47:51.400 D/dalvikvm( 7328): No JNI_OnLoad found in libnativehelper.so 0x0, skipping init

11-18 17:47:51.410 I/ActivityManager( 2286): Displayed uk.co.curlybracket.backup/.ui.MainActivity: +397ms

11-18 17:47:51.420 E/cutils-trace( 7328): Error opening trace file: No such file or directory (2)

11-18 17:47:51.430 D/dalvikvm( 7328): Note: class Landroid/app/ActivityManagerNative; has 180 unimplemented (abstract) methods

11-18 17:47:51.430 I/Timeline( 7296): Timeline: Activity_idle id: android.os.BinderProxy@42a42088 time:298666

11-18 17:47:51.590 D/AndroidRuntime( 7328): Calling main entry com.android.commands.am.Am

11-18 17:47:51.610 I/Timeline( 2286): Timeline: Activity_windows_visible id: ActivityRecord{430e5388 u0 uk.co.curlybracket.backup/.ui.MainActivity t7} time:298843

11-18 17:47:51.620 D/AndroidRuntime( 7328): Shutting down VM

11-18 17:47:51.640 D/AndroidRuntime( 7350):

11-18 17:47:51.640 D/AndroidRuntime( 7350): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<

11-18 17:47:51.640 D/AndroidRuntime( 7350): CheckJNI is OFF

11-18 17:47:51.650 D/dalvikvm( 7350): Trying to load lib libjavacore.so 0x0

11-18 17:47:51.650 D/dalvikvm( 7350): Added shared lib libjavacore.so 0x0

11-18 17:47:51.660 D/dalvikvm( 7350): Trying to load lib libnativehelper.so 0x0

11-18 17:47:51.660 D/dalvikvm( 7350): Added shared lib libnativehelper.so 0x0

11-18 17:47:51.660 D/dalvikvm( 7350): No JNI_OnLoad found in libnativehelper.so 0x0, skipping init

11-18 17:47:51.670 E/cutils-trace( 7350): Error opening trace file: No such file or directory (2)

11-18 17:47:51.680 D/dalvikvm( 7350): Note: class Landroid/app/ActivityManagerNative; has 180 unimplemented (abstract) methods

11-18 17:47:51.740 D/AndroidRuntime( 7351):

11-18 17:47:51.740 D/AndroidRuntime( 7351): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<

11-18 17:47:51.750 D/AndroidRuntime( 7351): CheckJNI is OFF

11-18 17:47:51.750 D/dalvikvm( 7351): Unable to stat classpath element '/system/framework/telephony-msim.jar'

11-18 17:47:51.750 D/dalvikvm( 7351): Unable to stat classpath element '/system/framework/framework-pac.jar'

11-18 17:47:51.750 D/dalvikvm( 7351): Unable to stat classpath element '/system/framework/framework-bam.jar'

11-18 17:47:51.750 D/dalvikvm( 7351): Unable to stat classpath element '/system/framework/qcmediaplayer.jar'

11-18 17:47:51.760 D/dalvikvm( 7351): Trying to load lib libjavacore.so 0x0

11-18 17:47:51.760 D/dalvikvm( 7351): Added shared lib libjavacore.so 0x0

11-18 17:47:51.760 D/dalvikvm( 7351): Trying to load lib libnativehelper.so 0x0

11-18 17:47:51.760 D/dalvikvm( 7351): Added shared lib libnativehelper.so 0x0

11-18 17:47:51.760 D/dalvikvm( 7351): No JNI_OnLoad found in libnativehelper.so 0x0, skipping init

11-18 17:47:51.780 E/cutils-trace( 7351): Error opening trace file: No such file or directory (2)

11-18 17:47:51.790 D/dalvikvm( 7351): Note: class Landroid/app/ActivityManagerNative; has 180 unimplemented (abstract) methods

11-18 17:47:51.830 D/AndroidRuntime( 7350): Calling main entry com.android.commands.am.Am

11-18 17:47:51.850 D/AndroidRuntime( 7350): Shutting down VM

11-18 17:47:51.860 I/AndroidRuntime( 7350): NOTE: attach of thread 'Binder_2' failed

11-18 17:47:51.930 D/AndroidRuntime( 7351): Calling main entry com.android.commands.pm.Pm

11-18 17:47:51.940 D/AndroidRuntime( 7351): Shutting down VM

11-18 17:47:52.260 W/InputMethodManagerService( 2286): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@4329f710 attribute=null, token = android.os.BinderProxy@42a423a0

11-18 17:47:53.500 W/dalvikvm( 7296): threadid=12: thread exiting with uncaught exception (group=0x4164cc80)

11-18 17:47:53.500 W/PackageParser( 7296): /storage/emulated/0/parcel_backups/com.android.managedprovisioning/ManagedProvisioning.apk (at Binary XML file line #0): Requires newer sdk version #21 (current version is #19)

11-18 17:47:53.500 E/AndroidRuntime( 7296): FATAL EXCEPTION: Thread-267

11-18 17:47:53.500 E/AndroidRuntime( 7296): Process: uk.co.curlybracket.backup, PID: 7296

11-18 17:47:53.500 E/AndroidRuntime( 7296): java.lang.NullPointerException

11-18 17:47:53.500 E/AndroidRuntime( 7296): at uk.co.curlybracket.backup.model.AppInfoHelper.addUninstalledBackups(AppInfoHelper.java:114)

11-18 17:47:53.500 E/AndroidRuntime( 7296): at uk.co.curlybracket.backup.model.AppInfoHelper.getPackageInfo(AppInfoHelper.java:88)

11-18 17:47:53.500 E/AndroidRuntime( 7296): at uk.co.curlybracket.backup.ui.MainActivity.updateAppInfoList(MainActivity.java:317)

11-18 17:47:53.500 E/AndroidRuntime( 7296): at uk.co.curlybracket.backup.ui.MainActivity$3.run(MainActivity.java:309)

11-18 17:47:53.500 E/AndroidRuntime( 7296): at java.lang.Thread.run(Thread.java:841)

11-18 17:47:53.500 W/ActivityManager( 2286): Force finishing activity uk.co.curlybracket.backup/.ui.MainActivity

11-18 17:47:53.570 D/ssLauncher( 2976): onStart

11-18 17:47:53.580 D/ssLauncher( 2976): onResume

11-18 17:47:53.580 D/ssLauncher( 2976): onPostResume

11-18 17:47:53.630 W/ActivityManager( 2286): No content provider found for permission check: content://com.google.android.gm/xxx@gmail.com/labels

11-18 17:47:53.630 E/ActivityThread( 2976): Failed to find provider info for com.google.android.gm

11-18 17:47:53.630 W/ActivityManager( 2286): No content provider found for permission revoke: content://com.google.android.gm/xxx@gmail.com/labels

11-18 17:47:53.660 I/Timeline( 2976): Timeline: Activity_idle id: android.os.BinderProxy@429faa48 time:300892

11-18 17:47:53.950 I/Timeline( 2286): Timeline: Activity_windows_visible id: ActivityRecord{432bd7a0 u0 com.ss.launcher.to/com.ss.launcher.SsLauncherActivity t1} time:301188

11-18 17:47:55.260 I/Process ( 7296): Sending signal. PID: 7296 SIG: 9

11-18 17:47:55.270 D/ssLauncher( 2976): hasFocus = true

11-18 17:47:55.290 I/ActivityManager( 2286): Process uk.co.curlybracket.backup (pid 7296) has died.

11-18 17:47:56.160 D/AndroidRuntime( 7391):

11-18 17:47:56.160 D/AndroidRuntime( 7391): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<

11-18 17:47:56.160 D/AndroidRuntime( 7391): CheckJNI is OFF

11-18 17:47:56.170 D/dalvikvm( 7391): Trying to load lib libjavacore.so 0x0

11-18 17:47:56.170 D/dalvikvm( 7391): Added shared lib libjavacore.so 0x0

11-18 17:47:56.180 D/dalvikvm( 7391): Trying to load lib libnativehelper.so 0x0

11-18 17:47:56.180 D/dalvikvm( 7391): Added shared lib libnativehelper.so 0x0

11-18 17:47:56.180 D/dalvikvm( 7391): No JNI_OnLoad found in libnativehelper.so 0x0, skipping init

11-18 17:47:56.200 E/cutils-trace( 7391): Error opening trace file: No such file or directory (2)

11-18 17:47:56.200 D/dalvikvm( 7391): Note: class Landroid/app/ActivityManagerNative; has 180 unimplemented (abstract) methods

11-18 17:47:56.340 D/AndroidRuntime( 7391): Calling main entry com.android.commands.am.Am

11-18 17:47:56.350 D/AndroidRuntime( 7391): Shutting down VM