I’ve erased my mac mini. Now I’m getting an error when I try to reinstall Sierra.

I erased my 2014 mac mini a few weeks ago, but for some reason was in “brain auto-pilot” when it was erasing and hit a key that moved me forward when I was supposed to select reinstall Monterey.

So, now I have a “dead computer”.

I’ve tried using the function keys on startup, which gets me to the screen that allows the options of time machine, reinstall monterey, something and disk utility.

I keep getting an error when I run option to reinstall software.

And although I choose the option that says “reinstall monterey” it comes up with os sierra, then loops with an error message; “an error occurred while preparing the installation. Try running this application again”

I’ve tried running it three times.

Any suggestions?