SSH server

SSH server. I can’t save the SSH_Private_HA.ppk file. When I klick on RESET TO DEFAULTS, it does not give the green blink. What is wrong? I have followed “Setting Up the SSH Add On - HassIO” https://youtu.be/L7PCPQYwspo from BRUH
SVAR

Please follow these instructions.

There is no ppk file to save, you past the public key string between the quotes as shown in the instructions.