I'm using the Twitch Desktop app as my mod manager. Works great accept it cannot find Routes, and when I sign in, and using the Twitch Install button on your addons page, the Twitch Desktop app comes up but nothing happens. I found and installed GatherMate2 with no issue, but the app cannot find Routes. Going straight to Curseforge.com I can find it not problem.
I am not sure if this is something that should be handled by Twitch support, so I'm leaving them a message as well.