I usually try the following in this order
1. Download Rom again. You may have a bad download.
2. Change to a different recovery
3. Sometimes I'll try using the ADB sideboard command in TWRP.
Give those a try.
Sent from my Moto G using XDA Premium
Nexus 4 running Stable CM 10.1
GSM Galaxy Nexus
HTC One S
HTC MyTouch 4g Slide