Error installing JSON datasource plugin

I am trying to install json datasource plugin, manually as the is firewall that prevents installing directly.

grafana is installed under windows.

getting this error:

Plugin Error
(SystemJS) XHR error (404 Not Found) loading http://localhost:8081/public/traceur?bust=1502095718794
Error: XHR error (404 Not Found)
loading http://localhost:8081/public/traceur?bust=1502095718794
Error loading http://localhost:8081/public/traceur
Unable to load transpiler to transpile http://localhost:8081/public/app/plugins/datasource/grafana-simple-json-datasource/module.js
Error loading http://localhost:8081/public/app/plugins/datasource/grafana-simple-json-datasource/module.js

was it by accident you created this topic 3 times?

https://community.grafana.com/t/error-installing-json-datasource-plugin/2161/1