fix loading

ember_debug/utils/type-check.js

@@ -46,7 +46,8 @@ export function getDescriptorFor(object, key) {
     const { descriptorForDecorator, descriptorForProperty } =
       emberSafeRequire('@ember/-internals/metal') || {};
     return (
-      descriptorForDecorator(object[key]) || descriptorForProperty(object, key)
+      descriptorForDecorator?.(object[key]) ||
+      descriptorForProperty?.(object, key)
     );
   }
 

package.json

@@ -106,20 +106,20 @@
     "ember-load-initializers": "^2.1.2",
     "ember-math-helpers": "^3.0.0",
     "ember-on-resize-modifier": "^1.0.0",
-    "ember-qunit": "^5.1.5",
+    "ember-qunit": "^6.1.1",
     "ember-resolver": "^10.0.0",
     "ember-router-service-refresh-polyfill": "^1.0.1",
     "ember-showdown": "^1.0.0-beta.1",
     "ember-sinon-qunit": "^7.1.4",
-    "ember-source": "~3.16.0",
+    "ember-source": "~4.12.0",
     "ember-source-channel-url": "^3.0.0",
     "ember-svg-jar": "^2.4.4",
     "ember-table": "^5.0.1",
     "ember-template-lint": "^5.2.0",
     "ember-test-selectors": "^6.0.0",
     "ember-truth-helpers": "^3.0.0",
-    "ember-try": "^2.0.0",
     "ember-wormhole": "^0.6.0",
+    "ember-try": "^2.0.0",
     "ensure-posix-path": "^1.1.1",
     "eslint": "^8.17.0",
     "eslint-config-prettier": "^8.5.0",
@@ -195,4 +195,4 @@
     "node": "18.16.0",
     "pnpm": "8.6.2"
   }
-}
+}