Hi gqevu6bsiz,
Thanks for your answer : It’s now ok.
The problem was about capabilities of Editor. When i “turn on” the capabilities “edit_users” for Editor everything now good.
The problem was not WP Admin UI Customize and not Flamingo.
I would like to say thank you for your plugin as it’s a great plugin for who want to custom admin access UI.
i have the same problem for show flamingo on side menu. Even i have only flamingo and WP Admin UI install on the wordpress (v4.1.1).
I try to put link of the flamingo page in custom_node on admin bar but wp give me error message that i can’t access to this page because of user role not enought hight