"Authentication failed: "no body"" - on automatic authentication

[eswiking]

hello,
i am trying to establish automatic authentication with my amazon accuount.
i have defined file path /opt/iobroker/amazon.txt
i see that the {"loginCookie":"session-id= ...} was written into the file after successfull authentication via web-webbrowser.
but when i deploy the flow in node-red again i get that error:
"Authentication failed: "no body""

is there anything e.g. workaround to fix this and get automatic authentication working ?