I tried it in a python3 venv, but the download data step is stuck at 0% unfortunately.

The bar only updates once that entire step is complete (ie, if step 1 of 3 is downloading roads, it won't tell you what % of roads have been downloaded, but rather it will remain at 0% until all roads are downloaded at which point it will jump to 33%).

It will work, give it time. Also default distance is 29000. Give distance of 10000 to see faster results. It certainly is working as many users have generated maps.