Self-hosted-ai-starter-kit n8n bad decrypt error

Questions
1

Fresh install of the self-hosted-ai-starter-kit using the instructions on github (GitHub - n8n-io/self-hosted-ai-starter-kit: The Self-hosted AI Starter Kit is an open-source template that quickly sets up a local AI environment. Curated by n8n, it provides essential tools for creating secure, self-hosted AI workflows.):
git clone GitHub - n8n-io/self-hosted-ai-starter-kit: The Self-hosted AI Starter Kit is an open-source template that quickly sets up a local AI environment. Curated by n8n, it provides essential tools for creating secure, self-hosted AI workflows.
cd self-hosted-ai-starter-kit
cp .env.example .env # you should update secrets and passwords inside
docker compose --profile gpu-nvidia up

I made sure to set the N8N_ENCRYPTION_KEY to the same value in the .env and docker-compose.yml files. This is the error message I receive:

n8n | Credentials could not be decrypted. The likely reason is that a different “encryptionKey” was used to encrypt the data.
n8n | Error: Credentials could not be decrypted. The likely reason is that a different “encryptionKey” was used to encrypt the data.
n8n | at Credentials.getData (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@[email protected][email protected][email protected][email protected]_/node_modules/n8n-core/src/credentials.ts:57:10)
n8n | at CredentialsService.decrypt (/usr/local/lib/node_modules/n8n/src/credentials/credentials.service.ts:369:32)
n8n | at /usr/local/lib/node_modules/n8n/src/credentials/credentials.service.ts:156:65
n8n | at Array.map ()
n8n | at CredentialsService.getMany (/usr/local/lib/node_modules/n8n/src/credentials/credentials.service.ts:155:31)
n8n | at processTicksAndRejections (node:internal/process/task_queues:105:5)
n8n | at CredentialsController.getMany (/usr/local/lib/node_modules/n8n/src/credentials/credentials.controller.ts:71:23)
n8n | at handler (/usr/local/lib/node_modules/n8n/src/controller.registry.ts:78:12)
n8n | at /usr/local/lib/node_modules/n8n/src/response-helper.ts:157:17
n8n |
n8n | error:1C800064:Provider routines::bad decrypt

Any guidance would be appreciated.

2

What do you mean, when you mention that you sed the N8N_ENCRIPTION_KEY same values in .env and docker-compose.yml files?
It needs to be set only in .env file.
In docker-compose.yml it just references that value from .env file.

3

That was my understanding, but when I didn’t set it there was a different value used when run. After I set it in the docker-compose.yml they are the same. I used “printenv | grep N8N_ENCRYPTION_KEY” check the value when the docker was running.

4

Found the answer here: N8n Qdrant Node "API key" & "Quadrant URL" fields are not auto-populating in the self-hosted-ai-starter-kit Docker example - #5 by nmvega

Do not change anything in the .env file even though it tells you to do so.

5

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