Failed to create machine on local ubuntu 18.04

[bh4rtp]

I don't know whether it is allowed to create a docker machine on my localhost VirtualBox VM with Ubuntu 18.04 installed. The IP of this VM is 192.168.56.104. I create like this:
allen@mangr:~$ docker-machine create --driver generic --generic-ip-address 192.168.56.104 exchange
Running pre-create checks...
Creating machine...
(exchange) Importing SSH key...
Waiting for machine to be running, this may take a few minutes...
Detecting operating system of created instance...
Waiting for SSH to be available...
Error creating machine: Error detecting OS: Too many retries waiting for SSH to be available. Last error: Maximum number of retries (60) exceeded

allen@mangr:~$ docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
exchange - generic Running tcp://192.168.56.104:2376 Unknown Unable to query docker version: Cannot connect to the docker engine endpoint

The docker 20.10.3 is already installed on Ubuntu 18.04.