Cannot sign into Tacx desktop app


I installed the Tacx Desktop App for Windows 10 recently. It is possible to sign in with the Garmin account. It works in the Windows App, iOS app and in But the Windows app throws an error: "Something went wrong, please try again later", whereas there is no problem signing in with the iOS app or via Is there any possibility to troubleshoot? I'd really like to try the Windows app.

Another strange thing just happened yesterday: My last workout (recorded with the latest iOS app) doesn't appear in my tacx cloud account, but shows up in my Garmin feed... that's strange.