Here’s the method I used from one of the issues on GitHub github.com/portainer/portainer/issues/12925#issue…

Iirc my docker.socket wouldn’t let me just stop docker.service to edit it as described in the post, so I made /etc/systemd/system/docker.service.d/override.conf with the 2 required lines. After saving it and running daemon-reload I was able to access my containers in portainer again.