First, use an Root Explorer and copy your downloaded Update Zip out of the Cache Folder and leak it
Edit : Ok, it's in the OP already. Sorry, it's 1am in Germany :sly:
Your RazR i is rooted, how did you root it? If you used the Unlocked Root (insecure Kernel), than grap the boot signed out of the sbf you flashed and use fastboot to install it
fastboot flash boot boot_signed.
After that it should work. If not, you maybe deleted some System Apps. If that's the case, flash the system_signed.
Sent from my XT890