Install Error - Registry returned 404

[fabriek-huis]

When I try install -
$ cocoonjs plugin add com.ludei.ios.webview.plus -d

Outputs -

[CocoonJS] Executing command 'plugin add com.ludei.ios.webview.plus -d'
[CocoonJS] Installing 'com.ludei.ios.webview.plus' in your CocoonJS Project.
Error: Registry returned 404 for GET on https://registry.npmjs.org/com.ludei.ios.webview.plus
[CocoonJS] Cannot install the WebView+ in your project, failed to execute the command `cocoonjs plugin add com.ludei.ios.webview.plus`. 
Error: Registry returned 404 for GET on https://registry.npmjs.org/com.ludei.ios.webview.plus

[zviredler]

how did you get this fixed? I am facing similar problem.