Post method API working in POSTMAN but not working in browser. And also get method working in browser

AbstractController::ActionNotFound (The action 'show' could not be found for PlayzoneController): actionpack (4.2.4) lib/abstract_controller/base.rb:132:in process' actionview (4.2.4) lib/action_view/rendering.rb:30:in process' actionpack (4.2.4) lib/action_controller/metal.rb:196:in dispatch' actionpack (4.2.4) lib/action_controller/metal/rack_delegation.rb:13:in dispatch' actionpack (4.2.4) lib/action_controller/metal.rb:237:in block in action' actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:76:in call' actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:76:in dispatch' actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:45:in serve' actionpack (4.2.4) lib/action_dispatch/journey/router.rb:43:in block in serve' actionpack (4.2.4) lib/action_dispatch/journey/router.rb:30:in each' actionpack (4.2.4) lib/action_dispatch/journey/router.rb:30:in serve' actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:821:in call' rack (1.6.13) lib/rack/etag.rb:24:in call' rack (1.6.13) lib/rack/conditionalget.rb:25:in call' rack (1.6.13) lib/rack/head.rb:13:in call' actionpack (4.2.4) lib/action_dispatch/middleware/params_parser.rb:27:in call' actionpack (4.2.4) lib/action_dispatch/middleware/flash.rb:260:in call' rack (1.6.13) lib/rack/session/abstract/id.rb:252:in context' rack (1.6.13) lib/rack/session/abstract/id.rb:247:in call' actionpack (4.2.4) lib/action_dispatch/middleware/cookies.rb:560:in call' activerecord (4.2.4) lib/active_record/query_cache.rb:36:in call' activerecord (4.2.4) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in call' actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:29:in block in call' activesupport (4.2.4) lib/active_support/callbacks.rb:88:in run_callbacks' activesupport (4.2.4) lib/active_support/callbacks.rb:778:in _run_call_callbacks' activesupport (4.2.4) lib/active_support/callbacks.rb:81:in run_callbacks' actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:27:in call' actionpack (4.2.4) lib/action_dispatch/middleware/reloader.rb:73:in call' actionpack (4.2.4) lib/action_dispatch/middleware/remote_ip.rb:78:in call' actionpack (4.2.4) lib/action_dispatch/middleware/debug_exceptions.rb:17:in call' web-console (2.3.0) lib/web_console/middleware.rb:20:in block in call' web-console (2.3.0) lib/web_console/middleware.rb:18:in catch' web-console (2.3.0) lib/web_console/middleware.rb:18:in call' actionpack (4.2.4) lib/action_dispatch/middleware/show_exceptions.rb:30:in call' railties (4.2.4) lib/rails/rack/logger.rb:38:in call_app' railties (4.2.4) lib/rails/rack/logger.rb:20:in block in call' activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in block in tagged' activesupport (4.2.4) lib/active_support/tagged_logging.rb:26:in tagged' activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in tagged' railties (4.2.4) lib/rails/rack/logger.rb:20:in call' actionpack (4.2.4) lib/action_dispatch/middleware/request_id.rb:21:in call' rack (1.6.13) lib/rack/methodoverride.rb:22:in call' rack (1.6.13) lib/rack/runtime.rb:18:in call' activesupport (4.2.4) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in call' rack (1.6.13) lib/rack/lock.rb:17:in call' actionpack (4.2.4) lib/action_dispatch/middleware/static.rb:116:in call' rack (1.6.13) lib/rack/sendfile.rb:113:in call' railties (4.2.4) lib/rails/engine.rb:518:in call' railties (4.2.4) lib/rails/application.rb:165:in call' rack (1.6.13) lib/rack/lock.rb:17:in call' rack (1.6.13) lib/rack/content_length.rb:15:in call' rack (1.6.13) lib/rack/handler/webrick.rb:88:in service' /home/gowtham/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/webrick/httpserver.rb:138:in service' /home/gowtham/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/webrick/httpserver.rb:94:in run' /home/gowtham/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'