News API with bubble API Connector not working

Hello,
I have created a new API with the bubble API Connector, but it is not working.

There was an issue setting up your call.
Raw response for the API
Status code 400
{“message”:“"Parameter ‘text’ not specified."”}

I have tested this API with the same settings in Postman and there it is running perfect.
Any ideas why?
I use the Free Plan. Is API function not working in the free plan?
Thanks!

No, it can work on free plan. Backend Workflow actions will not work. Try to check the content type in api header.

It’s set to

application/json