v4.1.0 : blocking error at Logstash startup

[fbaligand]

Since version 4.1.0, when I start Logstash, I have this blocking error, which shutdows Logstash :

Problems loading a plugin with {:type=>"input", :name=>"file", :path=>"logstash/inputs/file",
:error_message=>"No such file or directory - JAR_VERSION", :error_class=>Errno::ENOENT,
:error_backtrace=>["org/jruby/RubyIO.java:3600:in `read'",
"/logstash-6.1.1/vendor/bundle/jruby/2.3.0/gems/logstash-input-file-4.1.0/lib/filewatch/bootstrap.rb:33:in `<module:FileWatch>'", ...]

My environment :
OS : Windows 10
Logstash : v6.1.1

My Logstash configuration :

input {
	file {
		path => [ "C:/logstash/test-logstash/test-logstash-file.txt" ]
		start_position => "beginning"
		sincedb_path => "C:/logstash/test-logstash/test-logstash-file.sincedb"
	}
}
filter {
}
output {
	stdout {}
}