Fibaro HC2 integration fails

Hi to the 354 users of Fibaro HC2 integration,

I failed to integrate my Fibaro HC2.

Using the dialog of integration for Fibaro according to description:

Get the message “Verbindung fehlgeschlagen” which means “Connection failed”.

I tried several times and checked URL, user and pwd very, very carfully.

Please help. Thanks.

Regards Michael

I have exact same issue - few days ago this same works normally but no I can’t connect to Fibaro

URL with /api/* - is double checked
Username and Password is double checked

IS there ANY reason or explanation