EpicGamesLauncher's engine install button is not working

I’ve installed EpicGamesLauncher on my team’s PC, but the install button is grayed out. It does not work.

Whenever I leave this issue for an hour or so, the button turns yellow and I can install it.
I’m going to have to install UE on many of my computers, but I can’t wait that long. Does anyone have any idea what’s going on?