Seems like something is corrupted in docker.
Can you try the following
1. Try docker prune
again
2. systemctl restart docker
3 If nothing works, nuke the /var/lib/docker
directory, and redo docker pull trisulnsm/trisul6
. Fortunately the data will not be lost as Trisul stores all its data and config in the volume. However you will have to pull the full base image again. A few gigabytes
Trisul
You may need to clean up docker and re-pull the image.