Subflow Connection Fails When Called from Main Workflow

The subflow runs correctly when executed independently, but when called from the main workflow it fails with a connection error (522 - sub-workflow unreachable). This indicates the connection between the main workflow and subflow is not established properly during execution.

Payload :

{ "email": "user@test.com", "subject": "Need help", "text": "My account is not working" }

Files :