Yes, this is a known problem, Netatmo changed a few things.
There is a workaround using the NetatmoWeather module by demel42, as described here
Basically you need the latest version of NetatmoWeather module, use connection type developer account (!) with username/password authentication for the module and then create a token in your Netatmo developer account that you enter into the module once. Sounds complicated, but many of us already used that method described in the link above and it works. Hope you can get the thread translated somehow.