Rails server exits automatically. This is what i see below:

Macs-MacBook-Pro:try_app mac$ rails server /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/object/duplicable.rb:85: warning: BigDecimal.new is deprecated; use BigDecimal() method instead. => Booting WEBrick => Rails 4.2.3 application starting in development on http://localhost:3000 => Run rails server -h for more startup options => Ctrl-C to shutdown server /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Fixnum is deprecated /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Bignum is deprecated Exiting Traceback (most recent call last): 8483: from bin/rails:3:in <main>' 8482: from bin/rails:3:inload' 8481: from /Users/mac/try_app/bin/spring:15:in <top (required)>' 8480: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:inrequire' 8479: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in require' 8478: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in' 8477: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in load' 8476: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.0/bin/spring:49:in' ... 8471 levels... 4: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in block (2 levels) in <class:Numeric>' 3: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:inblock (2 levels) in ' 2: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in block (2 levels) in <class:Numeric>' 1: from /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:inblock (2 levels) in ' /Users/mac/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in ': stack level too deep (SystemStackError)