Connamara fix_protocol

I have installed fix_protocol, either the bundled with logstash 7.3 or from https://rubygems.org/gems/logstash-filter-fix_protocol/ logstash-filter-fix_protocol-0.3.3.gem. But in both case, logstash failed to find it with following error. The installation is /home/elastic/logstash-7.3.0 using unzip.

[2019-09-11T05:44:02,592][ERROR][logstash.agent ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:fss_uat, :exception=>"LogStash::PluginLoadingError", :message=>"Couldn't find any filter plugin named 'fix_protocol'. Are you sure this is correct? Trying to load the fix_protocol filter plugin resulted in this error: no such file to load -- i18n/core_ext/string/interpolate", :backtrace=>["/home/elastic/logstash-7.3.0/logstash-core/lib/logstash/plugins/registry.rb:221:in lookup_pipeline_plugin'", "/home/elastic/logstash-7.3.0/logstash-core/lib/logstash/plugin.rb:143:inlookup'", "org/logstash/plugins/PluginFactoryExt.java:203:in plugin'", "org/logstash/execution/JavaBasePipelineExt.java:50:ininitialize'", "/home/elastic/logstash-7.3.0/logstash-core/lib/logstash/java_pipeline.rb:24:in initialize'", "/home/elastic/logstash-7.3.0/logstash-core/lib/logstash/pipeline_action/create.rb:36:inexecute'", "/home/elastic/logstash-7.3.0/logstash-core/lib/logstash/agent.rb:325:in `block in converge_state'"]}

Kailash Pareek