Fix Twitch can't select Minecraft location | Flashes white, does nothing

Watch the video:

0:00 - Explanation
0:54 - What's going wrong

Downloading Minecraft from Twitch for the first time? Can’t locate Minecraft to select modpacks and more? Well, if you’re stuck on one page where it just flashes white or does nothing, then this is the solution you’re looking for. It’s incredibly annoying that there is no information about this or how exactly to fix it, but here’s the solution.