Hey
This error also occur because of version conflict so please check the version
On my MAC setup I have these versions :
“imgcache.js”: “^1.1.1”,
“ionic-angular”: “3.9.2”,
“ionic-cache”: “^2.0.5”,
“ionic-plugin-keyboard”: “^2.2.1”,
“ionicons”: “3.0.0”,
“ios”: “0.0.1”,
“rxjs”: “5.5.2”,
“sw-toolbox”: “3.6.0”,
“videogular2”: “^6.0.6”,
“zone.js”: “0.8.18”