If that’s the case, try this:
Download the NewTerm .deb from here
Mac users can use iOS App Signer to turn it from .deb to .iPA. Windows users can follow this video or this
Download Cydia Impactor from here and sideload the MobileTerminal.ipa to your iOS device
Go to the official site of i-Funbox and download it. Also, this lib.zip file as well
Open iFunbox and navigate to /var/mobile/Media/Books then drop the ‘lib’ folder to that directory
Last but not least, open MobileTerminal on your iPhone or iPad and type in the following commands.
type in your password. default is alpine
type: cp -R /var/mobile/Media/Books/lib /var
After that, Cydia should start working again. For those who have either iFile or Filza and Mobile Terminal installed already, you can start with Step 4 and forward.