title: Issue with Rails panel
body: <p>I am using the chrome extension <code>Rails Panel</code> in my Rails application. But it's not working properly.</p>
  
  <p><strong>Gemfile</strong></p>
  
  <pre><code>group :development do
    gem 'therubyracer', :platforms =&gt; :ruby
    gem 'better_errors'
    gem 'binding_of_caller'
    gem 'meta_request'
  end
  </code></pre>
  
  <p><strong>Development log:</strong></p>
  
  <pre><code>Errno::ENOENT - No such file or directory - /home/rahulv/sprint/S33/tmp/data/meta_request/d927421bce3c90bc465c9ceb894813ca.json:
    meta_request (0.3.4) lib/meta_request/storage.rb:16:in `read'
    meta_request (0.3.4) lib/meta_request/middlewares/meta_request_handler.rb:20:in `events_json'
    meta_request (0.3.4) lib/meta_request/middlewares/meta_request_handler.rb:11:in `call'
    pdfkit (0.5.4) lib/pdfkit/middleware.rb:16:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
    rack (1.4.5) lib/rack/etag.rb:23:in `call'
    rack (1.4.5) lib/rack/conditionalget.rb:25:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/head.rb:14:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/flash.rb:242:in `call'
    rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
    rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/cookies.rb:341:in `call'
    activerecord (3.2.16) lib/active_record/query_cache.rb:64:in `call'
    activerecord (3.2.16) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
    activesupport (3.2.16) lib/active_support/callbacks.rb:405:in `_run__572592932466143201__call__1542018980761186849__callbacks'
    activesupport (3.2.16) lib/active_support/callbacks.rb:405:in `__run_callback'
    activesupport (3.2.16) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
    activesupport (3.2.16) lib/active_support/callbacks.rb:81:in `run_callbacks'
    actionpack (3.2.16) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/reloader.rb:65:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
    better_errors (2.1.0) lib/better_errors/middleware.rb:84:in `protected_app_call'
    better_errors (2.1.0) lib/better_errors/middleware.rb:79:in `better_errors_call'
    better_errors (2.1.0) lib/better_errors/middleware.rb:57:in `call'
    rack-contrib (1.2.0) lib/rack/contrib/response_headers.rb:17:in `call'
    meta_request (0.3.4) lib/meta_request/middlewares/headers.rb:16:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
    railties (3.2.16) lib/rails/rack/logger.rb:32:in `call_app'
    railties (3.2.16) lib/rails/rack/logger.rb:16:in `block in call'
    activesupport (3.2.16) lib/active_support/tagged_logging.rb:22:in `tagged'
    railties (3.2.16) lib/rails/rack/logger.rb:16:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/request_id.rb:22:in `call'
    rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
    rack (1.4.5) lib/rack/runtime.rb:17:in `call'
    activesupport (3.2.16) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
    rack (1.4.5) lib/rack/lock.rb:15:in `call'
    actionpack (3.2.16) lib/action_dispatch/middleware/static.rb:63:in `call'
    railties (3.2.16) lib/rails/engine.rb:484:in `call'
    railties (3.2.16) lib/rails/application.rb:231:in `call'
    rack (1.4.5) lib/rack/content_length.rb:14:in `call'
    railties (3.2.16) lib/rails/rack/log_tailer.rb:17:in `call'
    thin (1.5.1) lib/thin/connection.rb:81:in `block in pre_process'
    thin (1.5.1) lib/thin/connection.rb:79:in `pre_process'
    thin (1.5.1) lib/thin/connection.rb:54:in `process'
    thin (1.5.1) lib/thin/connection.rb:39:in `receive_data'
    eventmachine (1.0.3) lib/eventmachine.rb:187:in `run'
    thin (1.5.1) lib/thin/backends/base.rb:63:in `start'
    thin (1.5.1) lib/thin/server.rb:159:in `start'
    rack (1.4.5) lib/rack/handler/thin.rb:13:in `run'
    rack (1.4.5) lib/rack/server.rb:268:in `start'
    railties (3.2.16) lib/rails/commands/server.rb:70:in `start'
    railties (3.2.16) lib/rails/commands.rb:55:in `block in &lt;top (required)&gt;'
    railties (3.2.16) lib/rails/commands.rb:50:in `&lt;top (required)&gt;'
    script/rails:6:in `&lt;main&gt;'
  </code></pre>
  
  <p>What seems to be the issue?</p>