Had that issue on my iphone 5 6.1 jailbroken... the problem is installing packages that is not currently compatible with the firmware you are currently running (for example a ios 5.1 tweek being used on ios 6.1). Take a look at your packages and see if you are using either a specific firmware package or an older package. That fixed the issue for me. It would be helpful to post a pic of your currently installed packages and I'll tell you which ones you shouldnt have