Netatmo API Error "Access Failed"

Hi everybody,

I’m new here in this community and working since 2 weeks with openHAB on my Raspberry Pi 3B+.
After the first configuration and working with Phillips Hue and other bindings I want to try the Netatmo Binding.

First I create a Netatmo app to get the Client ID and the Secret. Then I create the Netatmo API in openHAB.
After this configuration everything works fine but then my Netatmo API changed from Initializing to Offline. In my log I found this entry:

2018-12-10 19:45:10.154 [hingStatusInfoChangedEvent] - 'netatmo:netatmoapi:13539d91' changed from 
Failed, will retry in 5400 seconds.

My openHAB version is 2.3.0-1 installed with Raspbian which is based on Debian 9 Stretch.

I try many things. First I reset my Netatmo API, then I install my whole Pi new. New OS and new openHAB installation but nothing helps. I have no more ideas.

If there is anyone who can helps me I will be very lucky.

Thanks for all

Regards Speedy