OAuth with Bubble.io API Connector does not work although it is working in Postman

OAuth with Bubble.io API Connector does not work although it is working in Postman

Hi,
I am new to API programming but have successfully connected Google and Asana with the Bubble.io API connector.
Also I have setup Postman and can access Zoho APIs successfully e.g. Projects.
Scope used is: ZohoProjects.tasks.CREATE ZohoProjects.tasks.READ ZohoProjects.projects.READ

Trying to use the same settings incl. scopes from Postman in the Bubble API connector I always get the error message from within Bubble "Workflow error - API Connector error: the Oauth2 API Zoho OAuth is not configured properly - Received error from api The service Zoho OAuth just returned an error (HTTP 401). Please consult their documentation to ensure your call is setup properly. Raw error: {"response":"error","cause":"INVALID_OAUTHSCOPE"}"

This is the configuration that I use in Bubble.
Looking forward to crack this nut.

BR
Bernd