Steps to reproduce

1. Install Ibexa DXP
2. Add 2 languages e.g. French and German
3. Create two folders (and name them French and German)
4. Add site accesses to yaml with configured tree_root:

french:
    languages: [fre-FR]
    content:
        tree_root:
            location_id: 127
german:
    languages: [ger-DE]
    content:
        tree_root:
            location_id: 128 

1. Edit Landing Page Content Type and change flag always available to false
2. In the folder named French add a landing page
3. to the added landing page, add a new location pointing to the German folder
4. Create the role
   
5. Create a user and assign the user to the added role
6. Log in to the added user
7. Try to add translation to the added content in the german folder

Result

An exception has been thrown during the rendering of a template ("Could not find 'location' with identifier '140'"). 

Expected result

the user should be able to add a translation to the content, especially since already-added translations can be edited without any problems