| Step | Action | |------|--------| | 1 | – Re-copy from original email/license portal. | | 2 | Verify format manually: Must be n8n-ent-XXXXXXXXXXXXXXXX or n8n-pro-XXXXXXXX (length varies). | | 3 | Remove surrounding whitespace – Paste into Notepad to see hidden chars. | | 4 | Test in clean environment: docker run -it -e N8N_LICENSE_KEY=your-key n8nio/n8n | | 5 | Upgrade n8n if version < 0.200.0. | | 6 | Check if key is for Cloud only – Some keys cannot be used in self-hosted. |
n8n license keys follow a :