Here's how you can solve it (Step by Step Guide)
- Open MobileTerminal
- When MobileTerminal starts up, type in su then hit return.
- Now type in your password, default password if you did not change it is alpine and hit return
- Type in cd /var/stash then hit return.
- Now type in your MobileTerminal chmod -R 4755 /Applications/iFile.app or chmod -R 4755 /Applications.pwn/iFile.app and hit return.
- Now reboot your iPhone/iTouch/iPad.
After reboot,your iFile should be working properly as it is. Enjoy.
***P/S: Red highlighted/Bold/Italic words is the command you need to type in your MobileTerminal.