Some french users related a bug with Moodle 3.8+ and the Fordson v3.8 release 1 (2019111800)
When they click on "Site Administration", they are unable to access the various tabs (Users, Courses, Notes, Plugins, Presentation, Server, Reports, Development).
If they click on it, the link appears in the browser's address bar, but nothing changes in the on-screen display.
Even if you update the browser, it doesn't change anything.
Is it possible to see what's going on?
(Tested with FireFow and Chrome)