Docker SDK Manager sudo authentication failure

I am trying to re-flash my Xavier AGX using the latest docker version of the SDK manager because I am on 20.04, but I am running into a problem that when it asks for the sudo password, it gives me sudo authentication error. The password has no special characters in it. Any suggestions?

To support with Ubuntu 20.04 is not yet ready, it’s better to use Ubuntu 18.04. Thanks

Fair enough, but it seems like Docker should isolate me from this kind of thing. It will be very nice when things are upgraded to 20.04.