There's nothing to fix from a mylar perspective perse.
You need to update either/both the python charset and urllib3 modules as those are required dependencies for the requests library and are OS installed.
I'm not using the LSIO image for docker, but the invaderdag one, which is based off the LSIO image, but uses the dev branch of Mylar (not the master).
"bash" into the container with;
docker exec -it mylar bash (or whatever your container is called)
Then install requests with
pip install requests
After that everything started working nicely including DDL.
However the public torrent is failing, Which I believe is a cloudflare problem that the devs are aware of...