problem to run bundler server

[asghar bizaval]

hi

when in want to run ((bundler exec rails server)) for install rails on windows,

i encounter the following error

{Could not find gem 'puma (~> 3.7) x86-mingw32' in any of the gem sources listedin your Gemfile.Run `bundle install` to install missing gems.}

what is this?

I went through the video below. I just installed version 2.3

Install Ruby on Rails on Windows 7, 8 or 10 in 3 Minutes