I’m pretty new to jekyll, as I think I’m loving Ruby now more than ever but I got this error from following these steps:

https://jekyll-octopod.github.io/installation

I’m now on octopod setup command, but I got this when I press enter

➜  my-site git:(main) ✗ octopod setup
/Users/mbam1/.rubies/ruby-3.1.3/lib/ruby/3.1.0/psych.rb:670:in `initialize': No such file or directory @ rb_sysopen - /Users/mbam1/Desktop/my-site/_config.yml (Errno::ENOENT)
    from /Users/mbam1/.rubies/ruby-3.1.3/lib/ruby/3.1.0/psych.rb:670:in `open'
    from /Users/mbam1/.rubies/ruby-3.1.3/lib/ruby/3.1.0/psych.rb:670:in `load_file'
    from /Users/mbam1/.gem/ruby/3.1.3/gems/jekyll-octopod-0.9.23/bin/octopod:114:in `<top (required)>'
    from /Users/mbam1/.gem/ruby/3.1.3/bin/octopod:25:in `load'
    from /Users/mbam1/.gem/ruby/3.1.3/bin/octopod:25:in `<main>'

where is my mistake here?