Describe the problem/error/question
I am having trouble activating my Registered Community license on a self-hosted instance. When attempting to activate via the web UI or using the environment variable, the activation fails with a validation error regarding the device fingerprint.
However, running the CLI tool inside the container shows that a valid fingerprint is being generated. There seems to be a discrepancy where the background web process/SDK is passing an empty or truncated fingerprint string to your licensing servers.
When I first access the terminal of the container and manually run n8n license:info, a full, valid 64-character fingerprint is successfully generated and visible:
\~ $ n8n license:info
Puppeteer node: Container detected via .dockerenv file
\[license SDK\] Skipping renewal on init: license cert is not initialized
## CONSUMER CONFIG ##
tenantId: 1
productIdentifier: n8n-2.26.7
deviceFingerprint: a11f905a58a7525ef325c7a4a4fc27d1bde9a2ef695a19d4264672a3bbc62997
autoRenewalEnabled: true
autoRenewalOffset: 259200 (= 72h 0m 0s)
--
## LICENSE CERT ##
version: <n/a>
tenantId: <n/a> (!)
consumerId: <n/a>
deviceFingerprint: <n/a> (!)
createdAt: <n/a>
issuedAt: <n/a>
expiresAt: <n/a>
terminatesAt: <n/a>
isEphemeral: <n/a>
isValid: false (!)
isRenewalDue: false
detachedEntitlementsCount: <n/a>
entitlements: 0
History
-
I was unable to get Debug in Editor to work - it said I needed to be registered. I already should have been. I have been in the past - no idea why this changed.
-
I saw this in my logs:
[license SDK] cert is invalid because it has expired: (autorenewalsEnabled: true, expiredAt: Sat May 09 2026 15:29:44 GMT-0400 (Eastern Daylight Time), issuedAt: Wed Apr 29 2026 15:29:44 GMT-0400 (Eastern Daylight Time)) -
I do have TZ=America/New_York and a 32 bit N8N_ENCRYPTION_KEY which hasn’t changed. The encryption key is both in the environment and in the .n8n/config file
-
I ran this and saw:
\~ $ n8n license:info
Puppeteer node: Container detected via .dockerenv file
[license SDK] attempting license renewal
[license SDK] license successfully renewed
## CONSUMER CONFIG ##
tenantId: 1
productIdentifier: n8n-2.26.7
deviceFingerprint: a11f905a58a7525ef325c7a4a4fc27d1bde9a2ef695a19d4264672a3bbc62997
autoRenewalEnabled: true
autoRenewalOffset: 259200 (= 72h 0m 0s)
--
## LICENSE CERT ##
version: 2
tenantId: 1
consumerId: 84ac80cc-574f-4841-b0f3-2df3c875080f
deviceFingerprint: a11f905a58a7525ef325c7a4a4fc27d1bde9a2ef695a19d4264672a3bbc62997
createdAt: Fri May 09 2025 18:15:12 GMT-0400 (Eastern Daylight Time)
issuedAt: Thu Jun 18 2026 15:51:04 GMT-0400 (Eastern Daylight Time)
expiresAt: Sun Jun 28 2026 15:51:04 GMT-0400 (Eastern Daylight Time)
terminatesAt: Tue May 03 2050 18:15:12 GMT-0400 (Eastern Daylight Time)
isEphemeral: false
isValid: true
isRenewalDue: false
detachedEntitlementsCount: 0
entitlements: 1
--
## ENTITLEMENT 1 ##
id: 7a862864-5aab-4dac-a6fe-e1ea891a6459
productId: 031ebde1-0ebe-47b8-802a-29c084a2a4c3
validFrom: Fri May 09 2025 18:15:12 GMT-0400 (Eastern Daylight Time)
validTo: Sat May 05 2040 18:15:12 GMT-0400 (Eastern Daylight Time)
features: {"planName":"Registered Community","feat:folders":true,"feat:debugInEditor":true,"feat:workflowHistory":true,"feat:insights:viewSummary":true,"feat:workflowHistoryPrune":true,"quota:workflowHistoryPrune":24,"feat:advancedExecutionFilters":true,"quota:evaluations:maxWorkflows":1,"quota:insights:retention:maxAgeDays":180,"quota:insights:retention:pruneIntervalDays":24}
featureOverrides: {}
- When I try to click the button in the activation email or paste it in I get the same thing:
UI:
Activation key is in the wrong format
log:
[license SDK] license activation failed: request/body/deviceFingerprint must NOT have fewer than 32 characters
- I did n8n license:clear and then restarted. Now I get this in the log:
[license SDK] Skipping renewal on init: license cert is not initialized
and this is what I get in the shell
\~ $ n8n license:info
Puppeteer node: Container detected via .dockerenv file
\[license SDK\] Skipping renewal on init: license cert is not initialized
## CONSUMER CONFIG ##
tenantId: 1
productIdentifier: n8n-2.26.7
deviceFingerprint: a11f905a58a7525ef325c7a4a4fc27d1bde9a2ef695a19d4264672a3bbc62997
autoRenewalEnabled: true
autoRenewalOffset: 259200 (= 72h 0m 0s)
--
## LICENSE CERT ##
version: <n/a>
tenantId: <n/a> (!)
consumerId: <n/a>
deviceFingerprint: <n/a> (!)
createdAt: <n/a>
issuedAt: <n/a>
expiresAt: <n/a>
terminatesAt: <n/a>
isEphemeral: <n/a>
isValid: false (!)
isRenewalDue: false
detachedEntitlementsCount: <n/a>
entitlements: 0
-
I have tried using the lan ip instead of cloudflare url - http://192.168.200.12:5678/settings/usage?key=03329154-96a6-4bac-89f0-xxxxxxxxxxxx . Gives me the same errors
-
This used to work fine on this docker image (previous builds months ago).
-
I have also attempted passing the key directly to the container via N8N_LICENSE_ACTIVATION_KEY, which resulted in the same log failure.
I have used 3 different ai’s to help fix this and we are all out of ideas 
what can i do?
What is the error message (if any)?
When trying to activate via the UI or using N8N_LICENSE_ACTIVATION_KEY, the container logs show:
[license SDK] Skipping renewal on init: license cert is not initialized
[license SDK] license activation failed: request/body/deviceFingerprint must NOT have fewer than 32 characters
Could not activate license
Information on your n8n setup
- n8n version: 2.26.7 (also happens with earlier versions)
- Database (default: SQLite): Postgres
- n8n EXECUTIONS_PROCESS setting (default: own, main):
- Running n8n via (Docker, npm, n8n cloud, desktop app): synology docker
- Operating system: synology
