I installed that module but it doesn't seem to work. When I enable the ThemeToggle extension (and disable DarkMode), all I get on the Wiki is a blank page.
Ah yeah, I think I know why, the themes need to be defined beforehand, I'll do that quickly
It should work now, can you give it a shot again? I've set darkmode to be the default one and you should see that when you enable ThemeToggle