I was able to sideload the ota by doing the adb reboot bootloader. After rebooting into recovery I went to apply update from adb. After that on my computer, I have a Mac, I then typed in adb kill-server and pressed enter. Then I typed in adb sideload then dragged my ota which was in platform tools to the terminal beside my command and pressed enter. That worked for me. Not sure if it will work for you since you are rooted.
Posted via the Android Central App