Today I realized that I have 4 out of 15ish docker containers that are stopped (grafana, swag, photoprism, Transmissiong / OpenVPN). When I start any of them via the UI they fail immediately with "Failure. Request failed with status code 500". If I ssh into the server to launch the docker compose files I get the same error for all of them:
stat /srv/dev-disk-by-label-Docker/Docker/overlay2/1af8e33685ebdd5949f338938e70a05602a35e6995e81a2abfaef335621449fe: no such file or directory
I found an article on this and tried a bunch of the suggestions that seemed safe. Other suggestions (replacing volumes) seemed a bit risky for someone that is not an expert.
I did try to umount the overlay2 - it said that it was not mounted. No idea if that helps.