I've been trying all day to install 5.1 OTA via ADB. In my struggle, I tried installing TWRP to try to get it to work, but it didn't. I since flashed the stock recovery.
When trying to flash via ADB, this is my output log:
Finding update package... Opening update package... Verifying update package... Installing update... Verifying current system... "System/bin/install-recovery.sh" has unexpected contents. E:Error in /sideload/package.zip (Status 7) Installation aborted.