OAuth error using twitter API

Operating System: masOS Sierra 10.12.5
P.S. The tokens are right, double-checked them just to be sure.
I've attached the config and the stack trace below.
Logstash config:
```input {
twitter {
consumer_key => "xxx"
consumer_secret => "xxx"
oauth_token => "xxx"
oauth_token_secret => "xxx"
keywords => ["elastic]
full_tweet => true
}
}

output {
stdout {}
elasticsearch {
hosts => "localhost"
index => "twitter"
document_type => "tweet"
template => "twitter.json"
template_name => "twitter"
}
}
```
```
[2017-05-29T12:21:37,474][WARN ][logstash.inputs.twitter ] Twitter client error {:message=>"", :exception=>"Twitter::Error::Unauthorized", :backtrace=>["/usr/local/Cellar/logstash/5.4.0/libexec/vendor/bundle/jruby/1.9/gems/twitter-5.15.0/lib/twitter/streaming/response.rb:21:in `on_headers_complete'", "org/ruby_http_parser/RubyHttpParser.java:370:in `<<'", "/usr/local/Cellar/logstash/5.4.0/libexec/vendor/bundle/jruby/1.9/gems/twitter-5.15.0/lib/twitter/streaming/response.rb:16:in `<<'", "/usr/local/Cellar/logstash/5.4.0/libexec/vendor/bundle/jruby/1.9/gems/logstash-input-twitter-3.0.3/lib/logstash/inputs/twitter/patches.rb:31:in `stream'", "/usr/local/Cellar/logstash/5.4.0/libexec/vendor/bundle/jruby/1.9/gems/logstash-input-twitter-3.0.3/lib/logstash/inputs/twitter/patches.rb:58:in `request'", "/usr/local/Cellar/logstash/5.4.0/libexec/vendor/bundle/jruby/1.9/gems/twitter-5.15.0/lib/twitter/streaming/client.rb:37:in `filter'", "/usr/local/Cellar/logstash/5.4.0/libexec/vendor/bundle/jruby/1.9/gems/logstash-input-twitter-3.0.3/lib/logstash/inputs/twitter.rb:138:in `run'", "/usr/local/Cellar/logstash/5.4.0/libexec/logstash-core/lib/logstash/pipeline.rb:443:in `inputworker'", "/usr/local/Cellar/logstash/5.4.0/libexec/logstash-core/lib/logstash/pipeline.rb:436:in `start_input'"], :options=>nil}
```