Ruby on Rails Monday, October 1, 2018

Hi,
I'm going through Micheal Hart'ls Ruby on Rails 3rd Edition, on Cloud9 the Rails Server refuses to Start.
Ive tried many solutions offered by different websites but nothing worked. Please help - stuck in Chapter1 for the longest time

After putting the command "rails server -b $IP -p $PORT" on Cloud9 the following shows:

salsarkar:~/workspace/hello_app $ rails server -b $IP -p $PORT
=> Booting WEBrick
=> Rails 4.2.2 application starting in development on http://0.0.0.0:8080
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
/usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Fixnum is deprecated
/usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Bignum is deprecated
Exiting
/usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:124:in `block (2 levels) in <class:Numeric>': stack level too deep (SystemStackError)
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
from /usr/local/rvm/gems/ruby-2.4.0/gems/activesupport-4.2.2/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
... 5010 levels...
from /home/ubuntu/workspace/hello_app/bin/spring:15:in `require'
from /home/ubuntu/workspace/hello_app/bin/spring:15:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'

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