Are you sure the flow that gets the stream is working properly? Just a guess is that the error occurs due to an error in the payload format coming in to the node.
You’re sure it’s the same when it fails? The image looks like it was a good service call. You can add a change node to store the payload to a flow variable. Then when it fails look at what it sent.
edit: to view the variable, open node red to the page with the node, on the right where the debug is choose context. Then hit refresh next to the flow section.