There is ??Bug?? – whatever since the latest Dockerupdate. Portainer only show „Failed Loading Environment„
Here is a workaround from Git/Supportboard. This is NOT MY Fix. I just wrote an link it. It looks like its happening after the latest Docker-Update. For me, that works.
sudo mkdir /etc/systemd/system/docker.service.d
sudo vi /etc/systemd/system/docker.service.d/override.conf
Add this inside the file:
[Service]
Environment=DOCKER_MIN_API_VERSION=1.24
Then reload and restart
sudo systemctl daemon-reload
sudo systemctl restart docker