Trying to upgrade firmware thru update now button but it keeps failing

Received a firmware update available message, try clicking update now but keep getting this'll message: OTAUpdate please don't power down.data/media/0/download/update.zip: open failed: ENOENT (no such file or directory).

It starts to load like normal but never finishes entire process. I found a zip file, extracted the data but still no luck. I also looked online but can't find? What am I doing wrong? I have plenty of storage also.