Default Google+ disappeared and cannot install anymore

Hi,
I have cyanogenmod installed since january and updated it from time to time
Since i had the problem of the sytem.ui crash i reverted it to the 040112014 nightly but noticed that google+ disappeared.
So i tried to install it and got the "unknown error during installation: "-24"".
I even update the cyanogenmod, cleared cache and dalvik cache but i keep on having this error.
It looks like i can install other apps but not google+ anmore...
Can someone help me, please?
i would not like to do a hard reset,
thanks