Connection Error

[michae1a1ee]

Connection Error showing on screen of the Sense watch.
In the app settings I have the https://1234567.xyz domain listed that I access HA from.
The port is left blank and I have added a single entity name to test with so far. A freshly created token has been pasted into the app as needed.
I do also have "api:" in my configuration.yaml file
What else might be causing the connection error?