Wow... Such a "strong" community here...
For those having problems with Transmission with Librelec on RPi (obviously most of people land on this page after search), here's a quick solution for you:
1. Download relevnat .service file from here
2. In terminal SSH to your RPi and paste these two commands
Code
mkdir /storage/.kodi/addons/service.downloadmanager.transmission/lib
cp /usr/lib/libcrypto.so.37.0.0 /storage/.kodi/addons/service.downloadmanager.transmission/lib/libcrypto.so.35
3. Enjoy.
NOTE: NO DOCKER INVOLVED