Error trying to add phonegap plugin push

cordova
1

I´m trying to add phonegap plugin push and an error is happening:

Error: Failed to fetch plugin phonegap-plugin-push@2.0.0 via registry.
Probably this is either a connection problem, or plugin spec is incorrect.
Check your connection and plugin name/version/URL.
Error: cmd: Command failed with exit code ENOENT

or

Error: Failed to fetch plugin phonegap-plugin-push@1.10.5 via registry.
Probably this is either a connection problem, or plugin spec is incorrect.
Check your connection and plugin name/version/URL.
Error: cmd: Command failed with exit code ENOENT

cordova plugin add phonegap-plugin-push is not installing plugin in windows cmd. Reading a post from stackoverflow I tried with npm install phonegap-plugin-push. It works but it seems not to install completely. Console says PushNotification is not definied even after adding required code to package.json and config.xml.
I installed git for windows but the error continues and tried others tips as they said in my post here https://github.com/phonegap/phonegap-plugin-push/issues/1862 but nothing seems to help even if I create a new project

2

Post your ´ionic info` please.
Please also post the exact commands you are running and where you got these from.

3

It is working now. I don´t know what was happening. Maybe a server connection issue.