NodeRed "bucket-write" server event

I’m trying to develop a flow in NodeRed to edit data from bucket and write them in a new one.
I need to start my flow when some data are written to bucket from a sigfox callback (node “Server events”), read them and write to new bucket.
The flow works well, when I use “timestamp” trigger, it works.
But, when I use “Server events”, i get message “getaddrinfo ENOTFOUND http”.
I inserted token and the bucket address as
Can you help me to configure “server event - bucket write” node?