Steps to reproduce

1. Create clean installation of eZ Platform EE v2.2.2,
2. Create the new siteaccess, for instance nor,
3. Create a directory in the content root (Home), let's assume that it has location 59,
4. Configure nor siteaccess and set content.tree_root.location_id:

   ezpublish: 
       system:
           nor:
               languages: [nor-NO]
               content:
                   tree_root:
                       location_id: 59
                       excluded_uri_prefixes: [ /media, /users ]
   

5. Configure Page Builder to work with the new siteaccess:

   ezpublish: 
       system:
           admin_group:
               page_builder:
                   siteaccess_list: [site, nor]
   

6. Create a new article under location 59, let's name it Article 1,
7. Create a new article under Article 1, let's name it Article 2,
8. Edit Article 1 and add Article 2 to the RichText field as an embed,
9. Go to Article 1 and switch to Page mode,
10. In Page Mode, click on the Article 2 embed link.

Current behavior:
The Page Builder will switch to the limited mode.

Expected behavior:
The Page Builder should work normally.

Note:
The Page Builder works normally, when using site siteaccess which doesn't have content.tree_root.location_id limitation.