Knernel patcher failed!

[Vxer-Lee]

Traceback (most recent call last):
File "python_scripts/kernel_patcher.py", line 239, in
exit(main(args[0], options))
File "python_scripts/kernel_patcher.py", line 146, in main
manifest = plistlib.readPlistFromString(ipsw.read("BuildManifest.plist"))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/zipfile.py", line 935, in read
return self.open(name, "r", pwd).read()
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/zipfile.py", line 961, in open
zinfo = self.getinfo(name)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/zipfile.py", line 909, in getinfo
'There is no item named %r in the archive' % name)
KeyError: "There is no item named 'BuildManifest.plist' in the archive"
Kernel patcher failed !