Since yesterday i started getting error when installing plugins through ionic plugin add command
`Saving plugin to package.json file
Error happened [TypeError: Cannot convert undefined or null to object]
TypeError: Cannot convert undefined or null to object
at Function.keys (native)
at Object.getPluginFromFetchJsonByLocator (/usr/local/lib/node_modules/ionic/node_modules/ionic-app-lib/lib/state.js:734:26)
at Object.savePlugin (/usr/local/lib/node_modules/ionic/node_modules/ionic-app-lib/lib/state.js:670:36)
at /usr/local/lib/node_modules/ionic/lib/ionic/cordova.js:90:22
at _fulfilled (/usr/local/lib/node_modules/ionic/node_modules/q/q.js:787:54)
at self.promiseDispatch.done (/usr/local/lib/node_modules/ionic/node_modules/q/q.js:816:30)
at Promise.promise.promiseDispatch (/usr/local/lib/node_modules/ionic/node_modules/q/q.js:749:13)
at /usr/local/lib/node_modules/ionic/node_modules/q/q.js:557:44
at flush (/usr/local/lib/node_modules/ionic/node_modules/q/q.js:108:17)
at doNTCallback0 (node.js:419:9)
`