Gantry 5 - no outlines menu button?

Support Gantry
1

Hello

Using Gantry Version: 5.4.22, the outlines button and menu does not display on a current site:

gantry5-no-outlines-button-menu
gantry5-outlines-button-menu.jpg1600×900 137 KB

but it does on a previous test version:

gantry5-outlines-button-menu
gantry5-outlines-button-menu.jpg1600×900 134 KB

How to restore the Outlines button and menu?

Thank you.