Error in Owntracks app

Configuration
1

owntracks
owntracks500×747 25.1 KB

Getting this error when trying to set up owntracks on hassio (0.87.1) and an android phone.
Have set up the app on the phone with:
Mode: Private HTTP
Host: (Url from the popup window in configuration / Integration)
Identification:
Username: (my name)
Password: (same as my login to hassio)
Device ID: S8
Tracker ID: BS

And the encryption key in Preferences / Advanced / Encryption key

configuration.yaml

owntracks:
  max_gps_accuracy: 300
  waypoints: True

Nothing shows up in known_devices.yaml when I try to send a report from the app.

What am I doing wrong?