I’m bumping this topic because I’m having the same issue as described above, but the above solution hasn’t solved the problem. I’m logged in to https://crowdcontrol.live/ now, but the “login with Twitch” option on the desktop app is just looping infinitely.
It opens a Twitch sign-in window, but closes it before it loads, as if it’s just doing a one-click sign in. But it doesn’t actually do anything. I tried clearing my cache and re-installing the newest version of the app. Best I can get is the Twitch login window to fully load, at which point I put in my login info, complete my 2FA, and then it asks me to login with Twitch again. Rinse, repeat.