Install failed - Container SSH failed to find authorized keys

I’m getting a problem installing discourse.
Authorized keys not found. I believe this is an legacy way to access a container, no longer needed.

I can comment out the last line of web_only.yml which works.
But this is only possible on a second pass after web_only is populated/created.

By then the install has failed and discourse doctor reports instance not found.

Rebuilding doesn’t make any difference.

Had so many attempts I got temp blocked by Lets Encrypt. OK today.
I used to do these installs in my sleep ..lol.
72 hours and nothing but failures.
Doesn’t seem to be an answer. Catch 22?