logstash-plugin undefined method `headers' code example

Example: logstash-plugin undefined method `headers'

# Instead of using dots anywhere in the plugin path, i.e.:

bin/logstash-plugin install --no-verify ./myplugin.gem
bin/logstash-plugin install --no-verify ../someFolder/myplugin.gem


# do this:
bin/logstash-plugin install --no-verify myplugin.gem