So the idea is the launch a browser window with a tab for lottiefiles.com, where you get to authenticate the plugin/app with Lottiefiles. This does not work properly. I had to explicitly log out on lottiefiles.com in order to click "log in" in the plugin window, which then launched lottiefiles.com again where I could log in and only then I could authenticate the plugin. Took a while to find that out. The thing is, when I was already logged in on lottiefiles.com, I was presented with my dashboard, instead of the prompt to authenticate the app. The prompt only shows for fresh logins, not for sessions already logged in.