This bug is not fixed.
I have the same probleme on v1.9.
I have uncomment this line on security.xml
realm: eZ Publish REST API
Then I can use the REST api.
But if I try to log on platform I have this message "Failded to load root locations"
Then I comment back the line above. And try to log again on platform with admin account. But it failed too.
Now i can't connect to the platform whatever the configuration in security.xml.
How can I do to reconnect myself to the platform ?