Cannot find my _config.yml

e.g.

Could you help me?

install following the tutorial, and when launchin get those errors:

Could not find sass-3.4.25
(was 3.5.1, installed that version)

Could not find jekyll-3.5.0
(downgraded from 3.5.1)

Could not find minima-2.1.1
(not present, installed that theme)

Could not find thread_safe-0.3.6
(not present, installed that version)

Could not find tzinfo-1.2.3 tzinfo 1.2.3
(not present, installed that version)

Could not find tzinfo-data-1.2017.2
(not present, installed that version)

then, launching jekyll build:
You have already activated sass 3.5.1, but your Gemfile requires sass 3.4.25. Prepending 'bundle exec' to your command may solve this. (Gem::LoadError)

bundle exec jekyll build was a workaround, but gem uninstall sass -v 3.5.1 solved it.
`

this link https://labs.sverrirs.com/#versions
goes to an apache default install page.

Following the instructions for gem install wdm results in:

PS E:\Programming\Ruby23\devkit> gem install wdm
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing wdm:
        ERROR: Failed to build gem native extension.

    current directory: E:/Programming/Ruby23/lib/ruby/gems/2.3.0/gems/wdm-0.1.1/ext/wdm
E:/Programming/Ruby23/bin/ruby.exe -r ./siteconf20170127-20196-ups7xn.rb extconf.rb
checking for main() in -lkernel32... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Looking at the build log, here is the error:

E:/Programming/Ruby23/include/ruby-2.3.0/ruby/ruby.h:2041:12: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <winsock2.h>
4: #include <windows.h>
5: int main(int argc, char **argv)
6: {
7:   return 0;
8: }
/* end */

I don't know Ruby at all, and I'm not seeing any solutions online, do you have a workaround idea for this step? I'm using Windows 10 x64.

Hi sverrirs,
Great job on the documentation. However I found a few errors in it..
Namely:

• 1-ruby-and-devkit.md has Jenkyl gem in the pagination.. also in 3-syntax-highlighting.md..
• --watch on jekyll4windows broke only in 3.3.0.. its fine in 3.1.6 ~> 3.2.x. I dont know about <3.1.6

new to ruby and gem ecosystem, i have the feeling from this guide that gem install it's ever global, so i launch it every time from c:\RubyDevKit where the tutorial leave you during the installation seps. It's correct? TNX