Error: MissingPluginException(No implementation found for method init on channel plugins.indoor.solutions/pusher)

[eshun4]

Error: MissingPluginException(No implementation found for method init on channel plugins.indoor.solutions/pusher) at Object.throw_ [as throw] (http://localhost:58193/dart_sdk.js:5348:11) at MethodChannel._invokeMethod (http://localhost:58193/packages/flutter/src/services/system_channels.dart.lib.js:962:21) at _invokeMethod.next () at http://localhost:58193/dart_sdk.js:39230:33 at _RootZone.runUnary (http://localhost:58193/dart_sdk.js:39087:58) at _FutureListener.thenAwait.handleValue (http://localhost:58193/dart_sdk.js:34073:29) at handleValueCallback (http://localhost:58193/dart_sdk.js:34633:49) at Function._propagateToListeners (http://localhost:58193/dart_sdk.js:34671:17) at _Future.new.[_completeWithValue] (http://localhost:58193/dart_sdk.js:34513:23) at async._AsyncCallbackEntry.new.callback (http://localhost:58193/dart_sdk.js:34536:35) at Object._microtaskLoop (http://localhost:58193/dart_sdk.js:39374:13) at _startMicrotaskLoop (http://localhost:58193/dart_sdk.js:39380:13) at http://localhost:58193/dart_sdk.js:34887:9