No application_credentials platform for daikin_onecta

I’m trying to set up the Daikin Onecta integration through HACS. When I try to add the Onecta integration in Home Assistant I have to fill in a Client ID and Client ID Secret. After pressing confirm there is an error which says “No application_credentials platform for daikin_onecta”. What could be the problem here? I took the credentials from the Daikin developer platform as described in the installation instructions.

The credentials used: