On following internal links in eZ Platform page builder in v3.0.0-rc1 the system crashes with the following message:

Argument 1 passed to eZ\Publish\Core\Repository\SiteAccessAware\LocationService::loadLocation() must be of the type int, string given, called in /app/vendor/ezsystems/ezplatform-page-builder/src/bundle/Controller/PageController.php on line 571 [in vendor/ezsystems/ezplatform-kernel/eZ/Publish/Core/Repository/SiteAccessAware/LocationService.php:52] 

In v2.5. similar links work ok. The URL in the address bar when you get the error is: https://www.example.com/admin/page/preview/https%3A//www.example.com/en/about-us

Steps to reproduce:

1. Install clean copy of eZ Platform EE v3.0.0-rc1
2. Navigate to "eZ Platform" folder in structure
3. Edit object and create internal link to front page (ezlocation://2) on rich text 
4. Save and exit
5. Enter page tab and view "eZ Platform" in tab (path /admin/page/preview/42/eng-GB/12/site)
6. Click on internal link for error