Cydia repeatedly crashes just before installing any packages

Iv been jailbroken with pangu on iOS 8.1 since it came out with no problems but today when I try installing tweaks the cydia app freezes on the 'details' page of the tweak and then cydia closes a few seconds after.... I can go on the details pages of my already installed packages with no problems and I can do any thing else on cydia still but this makes it crash for some reason meaning that I can't download any packages..... Please help!!!