problem to start rails server "bundle exec rails serve" error

Question

When I tried to run bundle exec rails server to start the app, I got this message below. Anyone has an idea about this issue?

bundle exec rails server
=> Booting Thin
=> Rails 5.2.0 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options

Exiting Traceback (most recent call last):
49: from bin/rails:4:in <main>' 48: from bin/rails:4:in require'
47: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/commands.rb:18:in <top (required)>' 46: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/command.rb:46:in invoke'
45: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/command/base.rb:65:in perform' 44: from /usr/lib/ruby/vendor_ruby/thor.rb:369:in dispatch'
43: from /usr/lib/ruby/vendor_ruby/thor/invocation.rb:126:in invoke_command' 42: from /usr/lib/ruby/vendor_ruby/thor/command.rb:27:in run'
41: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:142:in perform' 40: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:142:in tap'
39: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:147:in block in perform' 38: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:51:in start'
37: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:89:in log_to_stdout' 36: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/server.rb:354:in wrapped_app'
35: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:27:in app' 34: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/server.rb:219:in app'
33: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/server.rb:319:in build_app_and_options_from_config' 32: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/builder.rb:40:in parse_file'
31: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/builder.rb:49:in new_from_string' 30: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/builder.rb:49:in eval'
29: from config.ru:in <main>' 28: from config.ru:in new'
27: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/builder.rb:55:in initialize' 26: from /var/lib/gems/2.5.0/gems/rack-2.0.4/lib/rack/builder.rb:55:in instance_eval'
25: from config.ru:3:in block in <main>' 24: from /var/lib/gems/2.5.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in require'
23: from /var/lib/gems/2.5.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in require' 22: from /home/ubuntu/PINGOWebApp-rails51/config/environment.rb:5:in <top (required)>'
21: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/application.rb:361:in initialize!' 20: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/initializable.rb:60:in run_initializers'
19: from /usr/lib/ruby/2.5.0/tsort.rb:205:in tsort_each' 18: from /usr/lib/ruby/2.5.0/tsort.rb:226:in tsort_each'
17: from /usr/lib/ruby/2.5.0/tsort.rb:347:in each_strongly_connected_component' 16: from /usr/lib/ruby/2.5.0/tsort.rb:347:in call'
15: from /usr/lib/ruby/2.5.0/tsort.rb:347:in each' 14: from /usr/lib/ruby/2.5.0/tsort.rb:349:in block in each_strongly_connected_component'
13: from /usr/lib/ruby/2.5.0/tsort.rb:431:in each_strongly_connected_component_from' 12: from /usr/lib/ruby/2.5.0/tsort.rb:350:in block (2 levels) in each_strongly_connected_component'
11: from /usr/lib/ruby/2.5.0/tsort.rb:228:in block in tsort_each' 10: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/initializable.rb:61:in block in run_initializers'
9: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/initializable.rb:32:in run' 8: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/initializable.rb:32:in instance_exec'
7: from /var/lib/gems/2.5.0/gems/railties-5.2.0/lib/rails/application/bootstrap.rb:81:in block in <module:Bootstrap>' 6: from /var/lib/gems/2.5.0/gems/activesupport-5.2.0/lib/active_support/lazy_load_hooks.rb:51:in run_load_hooks'
5: from /var/lib/gems/2.5.0/gems/activesupport-5.2.0/lib/active_support/lazy_load_hooks.rb:51:in each' 4: from /var/lib/gems/2.5.0/gems/activesupport-5.2.0/lib/active_support/lazy_load_hooks.rb:52:in block in run_load_hooks'
3: from /var/lib/gems/2.5.0/gems/activesupport-5.2.0/lib/active_support/lazy_load_hooks.rb:67:in execute_hook' 2: from /var/lib/gems/2.5.0/gems/activesupport-5.2.0/lib/active_support/lazy_load_hooks.rb:62:in with_execution_control'
1: from /var/lib/gems/2.5.0/gems/activesupport-5.2.0/lib/active_support/lazy_load_hooks.rb:69:in block in execute_hook' /var/lib/gems/2.5.0/gems/less-rails-2.8.0/lib/less/rails/railtie.rb:15:in block in class:Railtie': uninitialized constant Sprockets::Engines (NameError)

score 0 · Answer 1 · answered Nov 10 '20 at 12:55

I'm quite new, sorry if it don't work.

from this post uninitialized constant Sprockets::Engines (NameError)

try spring stop then relaunch your server. or gem update

if it don' work, desinstall some gems mentionned in your problem until you localize the faulty gem.

hope, it can help

score 0 · Answer 2 · answered Nov 10 '20 at 13:03

0

gem sprocket is causing the error.

You can resolve this. Go to the terminal and uninstall sprockets If it is installed you can check list of installed gems using gem list

and to uninstall it Run gem uninstall sprockets

then go to Gemfile and add following line

gem 'sprockets', git: 'git://github.com/sstephenson/sprockets.git'

now simply run bundle install on terminal and you can start your sever now using rails server on terminal

answered Nov 10 '20 at 13:03

Bilal Ahmad

44
3

i did that but after running bundle install i got this message error: Could not find gem 'sprockets' in git://github.com/sstephenson/sprockets.git (at master@8ef4c11). The source does not contain any versions of 'sprockets' – Soumia 7 Nov 11 '20 at 13:36

problem to start rails server "bundle exec rails serve" error

2 Answers2