N8n form: The item has no binary field for Einvoice community node

I have this simple workflow:

details:

  • n8n version: latest, self hosted
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): docker
  • Operating system: Ubuntu

my problem seems similar to: Extract from File node Unable to get n8n Form Trigger Uploaded file data - #6 by Gauner

the solution seems not intuitive to me since I can’t drag and drop that name: