uninitialized constant Fluent::TailInput (NameError)

[shahriar52]

The td-agent is broken after installing this plugin, it won't start again. Can you please help me?

Aug 31 15:07:42 controller01 td-agent[22756]: Starting td-agent: /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluent-plugin-tail-ex-0.1.1/lib/fluent/plugin/in_tail_ex.rb:5:in `<module:Fluent>': uninitialized constant Fluent::TailInput (NameError)
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluent-plugin-tail-ex-0.1.1/lib/fluent/plugin/in_tail_ex.rb:1:in `<top (required)>'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/registry.rb:102:in `block in search'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/registry.rb:99:in `each'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/registry.rb:99:in `search'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/registry.rb:44:in `lookup'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/plugin.rb:146:in `new_impl'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/plugin.rb:100:in `new_input'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/root_agent.rb:277:in `add_source'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/root_agent.rb:122:in `block in configure'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/root_agent.rb:118:in `each'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/root_agent.rb:118:in `configure'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/engine.rb:131:in `configure'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/engine.rb:96:in `run_configure'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/supervisor.rb:795:in `run_configure'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/supervisor.rb:579:in `dry_run'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/supervisor.rb:597:in `supervise'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/supervisor.rb:502:in `run_supervisor'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/lib/fluent/command/fluentd.rb:310:in `<top (required)>'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-1.2.5/bin/fluentd:8:in `<top (required)>'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/bin/fluentd:23:in `load'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /opt/td-agent/embedded/bin/fluentd:23:in `<top (required)>'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /usr/sbin/td-agent:7:in `load'
Aug 31 15:07:42 controller01 td-agent[22756]: #011from /usr/sbin/td-agent:7:in `<main>'
Aug 31 15:07:42 controller01 td-agent[22756]:  * td-agent
Aug 31 15:07:42 controller01 systemd[1]: td-agent.service: Control process exited, code=exited status=1
Aug 31 15:07:42 controller01 systemd[1]: Failed to start LSB: data collector for Treasure Data.
Aug 31 15:07:42 controller01 systemd[1]: td-agent.service: Unit entered failed state.
Aug 31 15:07:42 controller01 systemd[1]: td-agent.service: Failed with result 'exit-code'.