There's a red circular icon with a white horizontal dash in my taskbar which says : An error ocurred, please run package manager from the right-click menu or apt-get in a terminal to see what is wrong. THe error message was: Unknown error: 'class 'SystemError'> E: the package ksplice-uptrack needs to be reinstalled, but I can't find an archive for it.)'. This usually means that your installed packages have unmet dependencies.
I tried sudo apt-get remove uptrack and sudo apt-get --purge remove uptrack. After reading state information it just says : E: The package ksplice-uptrack needs to be reinstalled, but I can't find an archive for it.
Can't access ubuntu software center, software updater; and firefox is spontaneously closing.