OK, let’s remove portainer container and recreate it.
Be sure to get the right container ID of portainer:
docker ps -a
Remove it!
docker rm -f <container ID>
Check if it’s deleted:
docker ps -a
Just to be sure we delete the image too, get the image ID:
docker images -a
Remove images:
docker rmi -f <image> ID
Recreate portainer container (it’s recreated if it doesn’t exist):
signal-event nethserver-docker-update
Check if portainer is started now:
docker ps -a