Begin of the insertion### **Environment**:

Your OpenProject Version: 11.3 development

### **Logs**

```text
Unhandled Promise rejection: this.apiV3Service[plural] is undefined ; Zone: <root> ; Task: Promise.then ; Value: TypeError: this.apiV3Service[plural] is undefined
principalFromDataset principal.component.ts:94
ngOnInit principal.component.ts:67
Angular 11
performBootstrap dynamic-bootstrapper.ts:118
performBootstrap dynamic-bootstrapper.ts:109
bootstrapOptionalDocument dynamic-bootstrapper.ts:74
Angular 23
jQuery 9
zUnb main.ts:43
Angular 6
principalFromDataset@http://localhost:4200/assets/frontend/main.js:7404:22
ngOnInit@http://localhost:4200/assets/frontend/main.js:7384:35
callHook@http://localhost:4200/assets/frontend/vendor.js:149773:18
callHooks@http://localhost:4200/assets/frontend/vendor.js:149744:25
...
```

### **Steps to reproduce:**

1. Open a page with system user stuff
2. Watch principal component fail because `system_users`  is not defined on the api serviceEnd of the insertion