Base64 api auth - bubble api connector

Hi,
I’m trying to connect to acronis API (Authenticating to the platform - Account Management API) - but im struggeling with the first step…

here is my configuration

Basic value is client_id:client_secret encoded
content-type is application/x-www-form-urlencoded

I also tried this one:

any idea whats wrong with my config?

Try the second one again but change Body type to Raw instead of JSON.

solved it.