When I was on Oreo. This was steps .
Disable and uninstall all updates for YT, delete from storage cache and data. (Under apps in settings)
Install through recovery latest Vance's. Not through magisk app
Clean cache and dalvik.
First of all don´t forget to enable USB debugging and OEM unlock in developer options.
Then to identify you device using adb devices use adb reboot bootloader to send device to bootloader/fastboot mode.
In fastboot mode check just to be sur...