Can you please post your debug log?
I:Set page: 'install'
I:Set page: 'flash_confirm'
I:Set page: 'flash_zip'
I
peration_start: 'Flashing'
Installing '/sdcard/Download/open_gapps-arm-5.1-stock-20150621.zip'...
Checking for MD5 file...
Skipping MD5 check: no MD5 file found
I:Zip does not contain SELinux file_contexts file in its root.
I:Legacy property environment initialized.
Archive: /sdcard/Download/open_gapps-arm-5.1-stock-20150621.zip
inflating: bkup_tail.sh
inflating: g.prop
inflating: gapps-remove.txt
inflating: installer.data
################################################
____ ________
/ __ \___ ___ ___ / ___/ _ | ___ ___ ___
/ /_/ / _ \/ -_) _ \ / (_ / __ |/ _ \/ _ \(_-<
\____/ .__/\__/_//_/ \___/_/ |_/ .__/ .__/___/
/_/ /_/ /_/
################################################
Open GApps stock 5.1 - 20150621
- Mounting /system, /data, /cache
mount: mounting /dev/block/mmcblk0p28 on /data failed: Device or resource busy
mount: mounting /dev/block/mmcblk0p16 on /cache failed: Device or resource busy
mkdir: can't create directory '/tmp/logs': File exists
- Gathering device & ROM information
sh: armeabi-v7a,armeabi: unknown operand
- Performing system space calculations
du: /system/app/Chrome: No such file or directory
du: /system/app/FitnessPrebuilt: No such file or directory
du: /system/app/GoogleCalendarSyncAdapter: No such file or directory
du: /system/app/GoogleCamera: No such file or directory
du: /system/app/GoogleEars: No such file or directory
du: /system/app/Street: No such file or directory
du: /system/app/talkback: No such file or directory
du: /system/priv-app/GoogleHome: No such file or directory
du: /system/priv-app/Wallet: No such file or directory
du: /system/app/BrowserProviderProxy: No such file or directory
du: /system/app/Gmail: No such file or directory
du: /system/app/GoogleCalendar: No such file or directory
du: /system/app/GoogleCloudPrint: No such file or directory
du: /system/app/GoogleHangouts: No such file or directory
du: /system/app/GoogleKeep: No such file or directory
du: /system/app/GoogleLatinIme: No such file or directory
du: /system/app/GooglePlus: No such file or directory
du: /system/app/PartnerBookmarksProvider: No such file or directory
du: /system/app/QuickSearchBox: No such file or directory
du: /system/app/Vending: No such file or directory
du: /system/priv-app/GmsCore: No such file or directory
du: /system/priv-app/GoogleNow: No such file or directory
du: /system/priv-app/GoogleSearch: No such file or directory
du: /system/priv-app/GoogleHangouts: No such file or directory
du: /system/priv-app/OneTimeInitializer: No such file or directory
du: /system/priv-app/Provision: No such file or directory
du: /system/priv-app/QuickSearchBox: No such file or directory
du: /system/priv-app/Vending: No such file or directory
du: /system/app/GoogleBackupTransport: No such file or directory
du: /system/app/GoogleFeedback: No such file or directory
du: /system/app/GoogleHome: No such file or directory
du: /system/app/GoogleLoginService: No such file or directory
du: /system/app/GoogleOneTimeInitializer: No such file or directory
du: /system/app/GooglePartnerSetup: No such file or directory
du: /system/app/GoogleServicesFramework: No such file or directory
du: /system/app/Hangouts: No such file or directory
du: /system/app/Phonesky: No such file or directory
du: /system/app/PrebuiltGmsCore: No such file or directory
du: /system/app/SetupWizard: No such file or directory
du: /system/app/Velvet: No such file or directory
du: /system/app/Wallet: No such file or directory
du: /system/lib/libjni_latinime.so: No such file or directory
du: /system/lib/libjni_latinimegoogle.so: No such file or directory
du: /system/lib64/libjni_latinimegoogle.so: No such file or directory
du: /system/app/LatinIME/lib/arm/libjni_latinime.so: No such file or directory
du: /system/app/LatinIME/lib/arm/libjni_latinimegoogle.so: No such file or directory
du: /system/priv-app/talkback: No such file or directory
/tmp/updater: line 918: arithmetic syntax error
I:Legacy property environment disabled.
E:Error executing updater binary in zip '/sdcard/Download/open_gapps-arm-5.1-stock-20150621.zip'
Error flashing zip '/sdcard/Download/open_gapps-arm-5.1-stock-20150621.zip'
Updating partition details...
I
ata backup size is 3504MB, free: 37210MB.
I:Unable to mount '/usb_otg'
I:Actual block device: '', current file system: 'vfat'
...done
I:Set page: 'flash_done'
I
peration_end - status=1
I:Set page: 'clear_vars'
I:Set page: 'main2'
I:Set page: 'mount'
I:Set page: 'main'
I:Set page: 'clear_vars'
I:Set page: 'main2'
I:Set page: 'reboot'
I:Set page: 'rebootcheck'
I:Copying file /cache/recovery/log to /cache/recovery/last_log
Rebooting...