`': superclass mismatch for class Server (TypeError)

Question

I have seen this and several others question, but their problems are not similar to mine.

I have added the following code to the config/boot.rb , to run

Answer 1

A better way to do what you want:

require 'rails/commands/server'

module DefaultOptions
  def default_options
    super.merge!(Port: 8081)
  end
end

Rails::Server.prepend(DefaultOptions)

The reason for the error message is because you are attempting to redefine the Rails::Server class and changing it's inheritance structure. Rails::Server inherits from ::Rack::Server, however your code is trying to say it no longer does. Therefore, you get your superclass mismatch error.