【Ruby on Rails】さくらvpsでTwitter認証が動かない

最近HerokuからさくらvpsにRailsをアプリを移行したのですが、

いざ本番環境でRailsアプリを動かすと「HTTP ERROR 500」がでます。

Herokuで動かした時は出なかったエラーなので困っています。

〜環境〜
Ruby 2.3.0
Ruby on Rails 5.1.1
さくらvps
nginx
unicorn
mysql

エラーログは以下の通りです。

Started POST "/auth/twitter" for ******** at 2017-07-04 13:56:35 +0900
I, [2017-07-04T13:56:35.124871 #13131]  INFO -- omniauth: (twitter) Request phase initiated.

OAuth::Unauthorized (400 Bad Request):

vendor/bundle/ruby/2.3.0/gems/oauth-0.5.1/lib/oauth/consumer.rb:217:in `token_request'
vendor/bundle/ruby/2.3.0/gems/oauth-0.5.1/lib/oauth/consumer.rb:136:in `get_request_token'
vendor/bundle/ruby/2.3.0/gems/omniauth-oauth-1.1.0/lib/omniauth/strategies/oauth.rb:28:in `request_phase'
vendor/bundle/ruby/2.3.0/gems/omniauth-twitter-1.2.1/lib/omniauth/strategies/twitter.rb:61:in `request_phase'
vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:215:in `request_call'
vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:183:in `call!'
vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call'
vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/builder.rb:63:in `call'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/etag.rb:25:in `call'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/conditional_get.rb:38:in `call'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/head.rb:12:in `call'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/session/abstract/id.rb:222:in `context'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/session/abstract/id.rb:216:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/cookies.rb:613:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:97:in `__run_callbacks__'
vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:90:in `run_callbacks'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/callbacks.rb:36:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
vendor/bundle/ruby/2.3.0/gems/railties-5.0.0/lib/rails/rack/logger.rb:36:in `call_app'
vendor/bundle/ruby/2.3.0/gems/railties-5.0.0/lib/rails/rack/logger.rb:24:in `block in call'
vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/tagged_logging.rb:70:in `block in tagged'
vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/tagged_logging.rb:26:in `tagged'
vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/tagged_logging.rb:70:in `tagged'
vendor/bundle/ruby/2.3.0/gems/railties-5.0.0/lib/rails/rack/logger.rb:24:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/request_id.rb:24:in `call'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/method_override.rb:22:in `call'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/runtime.rb:22:in `call'
vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/executor.rb:12:in `call'
vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/static.rb:136:in `call'
vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/sendfile.rb:111:in `call'
vendor/bundle/ruby/2.3.0/gems/railties-5.0.0/lib/rails/engine.rb:522:in `call'
vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:606:in `process_client'
vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:702:in `worker_loop'
vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:549:in `spawn_missing_workers'
vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:142:in `start'
vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/bin/unicorn:126:in `<top (required)>'
vendor/bundle/ruby/2.3.0/bin/unicorn:23:in `load'
vendor/bundle/ruby/2.3.0/bin/unicorn:23:in `<main>'