Jul 29, 2017 · 1 min read
Hi Andy,
I’m currently doing this tutorial but I keep getting this error when doing rackup -p 5000:
undefined method `include’ for #<Rack::Builder:0x007fe87420b1b0> (NoMethodError)
from /Users/linhnguyenmy/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/rack-2.0.3/lib/rack/builder.rb:55:in `instance_eval’
I have already included the following line:
require “facebook/messenger”
include Facebook::Messenger
and have the gem installed
