I've tried pre-build and on-machine-builded torpoxy on fedora and ubuntu:
When starting proxy with this command:
torproxy start --insecure --registry '[{"endpoint": "http://rojen36pie4bb3ejc262qkpa57pyvddekum6ifkfzs5byrpqmpqhruyd.onion:80"}]'
nothing is shown and there isn't error log.
I also tried on sudo privileges.