Moto G2 No OS Found!

On my Moto G2, I first unlocked the bootloader, then rooted it. Then i factory reset the phone using TWRP, that is wiped all data . After some days, my phone got an OTA update from 5.0.2 to same 5.0.2. After updating, the phone went into recovery mode(TWRP) and then I wiped the Cache. Now it says No OS found in TWRP. I have downloaded a pre-rooted rom(Stock_XT1068_22.21.28-ROM) and tried sideloading it. But it says error opening the package. I want to install any ROM for my device. Help !!!!