[Registration] Cannot select an organization from the hierarchy picker

[maieutiquer]

Q	A
Bug report?	yes
Version?	13.1.2, 13.1.4

Steps:

1. Install Claroline 13.1.4 from scratch
2. Create at least one new organization in addition to the default organization, for example:
   
3. Check "Enable self-registration" from Administration -> Community -> Parameters
4. Add a custom tab, section and field of type Organization in Mode "List":
   
5. Log out and create a new non-admin account using the "Create an account" button
   (note: you'll need to remove the redux-freeze middleware, otherwise the "Validate my registration" button will not work, see [Registration] Cannot close confirmation modal on DEV builds #1964 )
6. Log in using the new non-admin account
7. Go to "My account" in Edit mode and try selecting an organization

Expected: you should be able to select an organization and its children, like this (an administrator can see all organizations):

Actual: you cannot see any organization, only the default one:

This is blocking us from testing the custom fields functionality and is urgent for us, is there a temporary workaround that we can try implementing in a temporary branch until this is fixed?

[Elorfin]

Organizations must be public to appear to users who are not registered in it.