ruby - Rails Server will not run -

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typing 

$ rails server

in terminal on mac yields these 2 errors i've tried troubleshooting uninstalling , installing ruby & rails again , same error.

typing 

localhost:3000

on browser brings broken webpage meaning rails not running properly.

as complete beginner, how troubleshoot these problems below step step rails run? 

ignoring binding_of_caller-0.7.2 because extensions not built.  try: gem pristine binding_of_caller --version 0.7.2 ignoring byebug-8.2.2 because extensions not built.  try: gem pristine byebug --version 8.2.2 ignoring debug_inspector-0.0.2 because extensions not built.  try: gem pristine debug_inspector --version 0.0.2 ignoring executable-hooks-1.3.2 because extensions not built.  try: gem pristine executable-hooks --version 1.3.2 ignoring gem-wrappers-1.2.7 because extensions not built.  try: gem pristine gem-wrappers --version 1.2.7 ignoring mysql2-0.4.2 because extensions not built.  try: gem pristine mysql2 --version 0.4.2 ignoring nokogiri-1.6.7.2 because extensions not built.  try: gem pristine nokogiri --version 1.6.7.2 ignoring binding_of_caller-0.7.2 because extensions not built.  try: gem pristine binding_of_caller --version 0.7.2 ignoring byebug-8.2.2 because extensions not built.  try: gem pristine byebug --version 8.2.2 ignoring debug_inspector-0.0.2 because extensions not built.  try: gem pristine debug_inspector --version 0.0.2 ignoring executable-hooks-1.3.2 because extensions not built.  try: gem pristine executable-hooks --version 1.3.2 ignoring gem-wrappers-1.2.7 because extensions not built.  try: gem pristine gem-wrappers --version 1.2.7 ignoring mysql2-0.4.2 because extensions not built.  try: gem pristine mysql2 --version 0.4.2 ignoring nokogiri-1.6.7.2 because extensions not built.  try: gem pristine nokogiri --version 1.6.7.2 dyld: lazy symbol binding failed: symbol not found: _rb_data_typed_object_alloc   referenced from: /users/leviathan/.rvm/gems/ruby-2.2.1/gems/debug_inspector-0.0.2/lib/debug_inspector.bundle   expected in: flat namespace  dyld: symbol not found: _rb_data_typed_object_alloc   referenced from: /users/leviathan/.rvm/gems/ruby-2.2.1/gems/debug_inspector-0.0.2/lib/debug_inspector.bundle   expected in: flat namespace  trace/bpt trap: 5

edit: try running gem pristine --all first.

try uninstalling , reinstalling bundler:

gem uninstall bundler gem install bundler

then run bundle install.

this install gems should have specified in gemfile, extensions.

e.g bundle complete! 33 gemfile dependencies, 103 gems installed.


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