エラーが出ていないのにRailsが起動しない

#コマンド
$ rails s

#ログ
=> Booting WEBrick
=> Rails 4.1.1 application starting in development on http://0.0.0.0:3000
=> Run rails server -h for more startup options
=> Notice: server is listening on all interfaces (0.0.0.0). Consider using 127.0.0.1 (--binding option)
=> Ctrl-C to shutdown server

#コメント
エラーメッセージは出てないように見えるのですが、
ブラウザで確認すると接続が拒否されてしまいます。

Ruby初心者なのでヒント等いただけると助かります。

#追記(gem list)
*** LOCAL GEMS ***

actioncable (5.2.1)
actionmailer (5.2.1, 4.1.1)
actionpack (5.2.1, 4.1.1)
actionview (5.2.1, 4.1.1)
activejob (5.2.1)
activemodel (5.2.1, 4.1.1)
activerecord (5.2.1, 4.1.1)
activestorage (5.2.1)
activesupport (5.2.1, 4.1.1)
arel (9.0.0, 5.0.1.20140414130214)
bigdecimal (1.3.5, default: 1.3.2)
builder (3.2.3)
bundler (1.16.5)
coffee-rails (4.2.2, 4.0.1, 4.0.0)
coffee-script (2.4.1)
coffee-script-source (1.12.2)
concurrent-ruby (1.0.5)
crass (1.0.4)
did_you_mean (1.1.0)
erubi (1.7.1)
erubis (2.7.0)
execjs (2.7.0)
ffi (1.9.25 x64-mingw32)
globalid (0.4.1)
hike (2.1.3, 1.2.3)
i18n (1.1.0, 0.9.5)
io-console (default: 0.4.6)
jbuilder (2.7.0, 2.6.4, 2.0.0)
jquery-rails (4.3.3, 3.1.5)
json (2.1.0, default: 2.0.4, 1.8.6)
loofah (2.2.2)
mail (2.7.0, 2.5.5)
marcel (0.3.3)
method_source (0.9.0)
mime-types (3.2.2, 1.25.1)
mime-types-data (3.2018.0812)
mimemagic (0.3.2)
mini_mime (1.0.1)
mini_portile2 (2.3.0)
minitest (5.11.3, 5.10.1)
multi_json (1.13.1)
net-telnet (0.2.0, 0.1.1)
nio4r (2.3.1)
nokogiri (1.8.4 x64-mingw32)
openssl (2.1.1, default: 2.0.7)
polyglot (0.3.5)
power_assert (1.1.3, 0.4.1)
psych (3.0.2 x64-mingw32, default: 2.2.2)
rack (2.0.5, 1.5.5)
rack-test (1.1.0, 0.6.3)
rails (5.2.1, 4.1.1)
rails-dom-testing (2.0.3)
rails-html-sanitizer (1.0.4)
railties (5.2.1, 4.1.1)
rake (12.3.1, 12.0.0)
rb-fsevent (0.10.3)
rb-inotify (0.9.10)
rdefs (0.0.2)
rdoc (6.0.4, default: 5.0.0, 4.3.0)
sass (3.6.0, 3.2.19)
sass-listen (4.0.0)
sass-rails (5.0.7, 4.0.5, 4.0.3)
sdoc (1.0.0, 0.4.2, 0.4.0)
sprockets (3.7.2, 2.12.5, 2.11.0)
sprockets-rails (3.2.1, 2.3.3)
sqlite3 (1.3.13 x64-mingw32)
test-unit (3.2.8, 3.2.3)
thor (0.20.0)
thread_safe (0.3.6)
tilt (2.0.8, 1.4.1)
treetop (1.6.10, 1.4.15)
turbolinks (5.2.0)
turbolinks-source (5.2.0)
tzinfo (1.2.5)
tzinfo-data (1.2018.5)
uglifier (4.1.19)
websocket-driver (0.7.0)
websocket-extensions (0.1.3)
xmlrpc (0.3.0, 0.2.1)