45205: Requested Flex Flow is not found

This error occurs when a Flex request or related messaging request references a Flex Flow that Twilio cannot locate. A Flex Flow links a messaging identity, such as an SMS number or web chat identity, to Flex and defines how inbound messages are handled.

• The request references a Flex Flow SID that does not exist when Twilio tries to fetch, update, or use a Flex Flow resource identified by an FO SID.
• No Flex Flow exists for the messaging identity you are connecting to Flex. Each phone number, chat channel, or other messaging contact identity needs a corresponding Flex Flow.
• For SMS, the phone number was not registered on the Flex Messaging page and no Flex Flow was created for that number.

• Verify the Flex Flow SID in your request. Then confirm that the resource can be fetched from /v1/FlexFlows/{Sid} or that it appears in the Flex Console.
• Create a Flex Flow for every messaging identity that you connect to Flex. You can manage Flex Flows in the Flex Console or with the Flex Flow API.
• For SMS, register the phone number on the Flex Messaging page so Twilio links the number's message handler to Proxy and creates a Flex Flow. If you configure SMS manually, point the phone number's message handler to the Flex Proxy Service and create the Flex Flow entry through the API.
• When you create or update the Flex Flow, provide the integration settings required for the selected integrationType. Use integration.flowSid for studio, integration.url for external, and integration.workspaceSid, integration.workflowSid, and integration.channel for task.

• Manage Flex Flows
• Flex Flow resource API reference
• Receive inbound messages from SMS, WhatsApp, and Facebook Messenger