Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'on')

[hexadecy]

When I rename the 'router' to { 'host-router': 'router' } in all my engines.
https://ember-engines.com/docs/deprecations#-use-alias-for-inject-router-service-from-host-application

I have this error from ember-component-css:

route-styles.js:13 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'on')
    at Object.initialize (route-styles.js:13:1)
    at index.js:127:1
    at Vertices.each (dag-map.js:192:1)
    at Vertices.walk (dag-map.js:121:1)
    at DAG.each (dag-map.js:66:1)
    at DAG.topsort (dag-map.js:72:1)
    at Class._runInitializer (index.js:139:1)
    at Class.runInstanceInitializers (index.js:125:1)
    at Class._bootSync (instance.js:86:1)
    at instance.js:63:1

ember-component-css/instance-initializers/route-styles.js
Error at the line:

router.on('routeDidChange', function (_ref) {

Full trace:

define("ember-component-css/instance-initializers/route-styles", ["exports", "ember-component-css/utils/init-route-styles"], function (_exports, _initRouteStyles) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.default = void 0;
  _exports.initialize = initialize;
  function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
  // This file is removed from the build in Ember < 3.6
  function initialize(appInstance) {
    var router = appInstance.lookup('service:router');
    router.on('routeDidChange', function (_ref) {
      var to = _ref.to;
      if (likeRouteInfo(to)) {
        (0, _initRouteStyles.default)(appInstance, nestedRouteNames(to));
      }
    });

Versions:

• ember-source: 3.28.11
• ember-engines: 0.8.23 or 0.9.0
• ember-component-css: 0.8.1
• Node 16

[SergeAstapov]

Thanks @hexadecy for the detailed report! I wonder if using https://github.com/villander/ember-engines-router-service may be a temporary solution