Console error shown, If I directly browse the page http://localhost:4200/pages/layout/infinite-list, or refresh the page

### Issue type

**I'm submitting a ...** (check one with "x")

* [x] bug report
* [ ] feature request
* [ ] question about the decisions made in the repository

### Issue description

**Current behavior:**
After cloning the repository, and when I navigate the page http://localhost:4200/pages/layout/infinite-list, it shows console error, and window scroll section not showing anything.

The window scroll section shows fine, if you start navigating from dashboard, and navigating to that page, it won't work only refresh.

**Expected behavior:**
That page must work properly, with relevant data loaded into window scroll section.

**Steps to reproduce:**
1. Start by using "ng serve -o" command line.
2. Go to page http://localhost:4200/pages/layout/infinite-list, you can see window scroll section not showing anything and console error logged

**Related code:**

```
insert short code snippets here
```

### Other information:

**npm, node, OS, Browser**
```

```
node --version: v12.7.0
npm --version: 6.12.1
OS: Windows 10
Browser: Chrome 87
**Angular, Nebular**
```

```

Angular version: 10.0.10
Nebular: 6.00 (Just cloned, and run from master branch)