Skip 0.55.1 - go directly to 0.55.2

Hi Frenck,
thanks for the instructions. After following them, now I get below error:
$ ssh -p 22222 [email protected]
Permission denied (publickey).

Any ideas?

How can I ensure that I my generated private key is used for authentication? what is the command?
PS: Do I need to copy authorized_keys.pub file to the root of SD card as well?

Place the contents of your public key file into a file called ‘authorized_keys’ on the root of the SD card

where is 0.55.2, I see only 0.55.1? Or has been solved?

It was already on the root of SD card as shown in the image but didn’t work.
I copied by plugging the sd card to my macbook and just copied via Finder.
Is there any special copy command via terminal that I need use instead of Finder?