Dropdowns don't work

[Lucifer]

I just installed gekko, and it started up in Firefox.  I tried to make it work, but when I tried configuring (and everything else), none of the dropdown menus worked.  If I let it go to the default, it went into polinex without any way to change it.  npm reports no errors or vulnerabilities.  It's running on Ubuntu 18.04 that's fully up to date and freshly installed.

Please help?