Probably has the wrong permissions or maybe a corrupted apk? Try deleting the apk and copying it back with the right permissions (0644)
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Current Phone: Nexus 5 16GB Black D821
ROM: Stock KitKat 4.4.2 with root and TWRP (unlocked bootloader)
Current Tablet: ASUS Nexus 7 (2013) 16GB Black
ROM: Stock KitKat 4.4.2 with root and TWRP (unlocked boot loader)
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