Again Gitlab and "Signing key cannot be empty"

hello!
I don't understand what I'm doing wrong.
I have searched all forum threads on this problem. I have watched all the videos on youtube. I have read all the threads on discord. I've banged my head against the wall. It's not working.

Appwite - 1.4.13

Trace:

I am using Docker Swarm and Portainer to deploy appwrite.

I've inserted the private key into .env both as a single string \n and as a multi-line variant in "".

Nothing helps.

Portainer? And .env?

yes.
command for deploy:
export $(grep -v '^#' .env | xargs) && docker stack config -c docker-compose-swarm.yml && docker stack deploy -c docker-compose-swarm.yml appwrite

and in Portainer change private key on service Appwrite and Build

Sorry can you clarify the portainer part? I'm not well versed with portainer