Amazon Connect Create Callback Error from Sample Queue Configurations Flow

Hello AWS Community, I just created my instance and, getting a test inbound call through the out of the box "Sample Queue Configurations Flow" and choosing the option to be called back, I enter my phone number, hear the prompt "You will be called back ..." but then I hear, "Something went wrong" error prompt for the Transfer to Queue block. I tried creating a separated queue for Callback and then use that on the Transfer to Queue block, but no luck, it's the same behavior. On the Cloudwatch logs I just see a generic error, nothing specific. { "Results": "Error", "ContactId": "de890f82-f415-4a29-8b05-xxxxxxx", "ContactFlowId": "arn:aws:connect:us-east-1:xxxxxx:instance/da5b3216-194c-45e1-a814-xxxxxx/contact-flow/e9d60d7f-64c4-4f43-8b92-xxxxxxxx", "ContactFlowName": "Sample interruptible queue flow with callback", "ContactFlowModuleType": "CreateCallback", "Timestamp": "2023-06-27T02:08:43.634Z", "Parameters": { "InitialDelaySeconds": "5", "CustomerPhoneNumber": "+1XXXXXXXXXX", "MaxRetryAttempts": "1", "RetryDelaySeconds": "600" } }

Since this is pretty basic built-in flow and not working from the start, I have no idea what could possibly be missing. Any advice is appreciated, thank you in advance