Unknown plugin for the miniduke git project

Elastic Stack Elasticsearch
1

For this project I have build plugin zip. And when I try to install plugin getting error as Unknown plugin. I have installed in ES 5.6.7

15%20PM
Screen Shot 2019-09-20 at 6.34.15 PM.png1732×484 43.2 KB

2

For a file you need to give a uri. Try prefixing you path with file://