API connector, schema setup, can't post JSON

Wappler Version : 4.4.5
Operating System : MacOS
Server Model: NodeJS
Database Type: PostgreSQL
Hosting Type: Docker

Expected behavior

Can preview schema, by inputting JSON and clicking “Fetch Schema”

Actual behavior

API request is not actually performed, the error message comes from Wappler

How to reproduce

Create API action to a Beeceptor endpoint, set POST method and JSON:

{{ rows.data }}
[{"name": "George"}]

(yes, it’s an array of objects)