Default [Q] Why won't TWRP install kitkat ROMs?

I'm on the latest TWRP.

It just installs the ROM normally, but when it gets to the step of 'update partition' there's an error an it stops. When I try to boot it, it shows a pinkish type of screen and I have to restore a back-up.

Any ideas how to fix this? It's only for kitkat roms.