Invalid WebSocket frame: MASK must be set

Questions
1

Describe the problem/error/question

What is the error message (if any)?

Please share your workflow

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)

root@n8n:~/projects/n8n# npx n8n
Permissions 0644 for n8n settings file /root/.n8n/config are too wide. This is ignored for now, but in the future n8n will attempt to change the permissions automatically. To automatically enforce correct permissions now set N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS=true (recommended), or turn this check off set N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS=false.
User settings loaded from: /root/.n8n/config
Initializing n8n process
n8n ready on 0.0.0.0, port 5678

There is a deprecation related to your environment variables. Please take the recommended actions to update your configuration:
 - N8N_RUNNERS_ENABLED -> Running n8n without task runners is deprecated. Task runners will be turned on by default in a future version. Please set `N8N_RUNNERS_ENABLED=true` to enable task runners now and avoid potential issues in the future. Learn more: https://docs.n8n.io/hosting/configuration/task-runners/

Version: 1.81.4

Editor is now accessible via:
https://static.****.65.clients.your-server.de

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The session "1ugvssujuu" is not registered.
Invalid WebSocket frame: MASK must be set
Invalid WebSocket frame: MASK must be set
Invalid WebSocket frame: MASK must be set

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Information on your n8n setup

  • n8n version:
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via npx
  • Operating system: Ubuntu 24
2

It is recommended to use the docker / docker compose setup to deploy n8n. Have you tried that?