While trying to create a message template that uses flows through the API endpoint https://graph.facebook.com/v21.0/{META_BUSINESS_ID}/message_templates, I am encountering the following error: {'error': {'message': 'Invalid parameter', 'type': 'OAuthException', 'code': 100, 'error_subcode': 2388261, 'is_transient': False, 'error_user_title': 'Error Adding Flow Button', 'error_user_msg': 'The field flow_json contains invalid Flow json. Flow JSON validation failed due to an internal error. Please try again., line_start: 0, line_end: 0, column_start: 0, column_end: 0.', 'fbtrace_id': 'Ank3sFQHJO7ZavpWT6ch9Si'}}

However, when I use the same flow_json to create a flow in WhatsApp Manager, I am able to create and publish the flow successfully. Additionally, when I use the published flow_id while creating the message template, it works as expected. The error only occurs when attempting to create the template through the API using flow_json.