error trying to start tileserver - ImportError: cannot import name on_invalid_geometry_make_valid about tileserver HOT 6 CLOSED

sudo apt-get update \
    && apt-get install -y git build-essential autoconf libtool pig-config \
    python-dev python-virtualenv libgeos-dev libpq-dev python-pip python-pil \
    libmapnik3.0 libmapnik-dev mapnik-utils python-mapnik

# avoids an errors when running requirements.txt
pip install pip --upgrade
pip install python-dateutil
pip install mapbox-vector-tile

git clone https://github.com/tilezen/tileserver.git
cd /tileserver
git checkout tags/v0.6.1
pip install -U -r requirements.txt
python setup.py develop

Collecting mapbox-vector-tile
  Downloading mapbox-vector-tile-0.3.0.tar.gz
Requirement already up-to-date: setuptools in /usr/local/lib/python2.7/dist-packages (from mapbox-vector-tile)
Collecting protobuf (from mapbox-vector-tile)
  Downloading protobuf-2.6.1.tar.gz (188kB)
Collecting shapely (from mapbox-vector-tile)
  Downloading Shapely-1.5.16.tar.gz (180kB)
Collecting future (from mapbox-vector-tile)
  Downloading future-0.15.2.tar.gz (1.6MB)
Building wheels for collected packages: mapbox-vector-tile, protobuf, shapely, future
  Running setup.py bdist_wheel for mapbox-vector-tile: started
  Running setup.py bdist_wheel for mapbox-vector-tile: finished with status 'done'
  Stored in directory: /root/.cache/pip/wheels/1b/34/56/288168c0f92ca9eb2945495ea57227963d358f08980bd6714c
  Running setup.py bdist_wheel for protobuf: started
  Running setup.py bdist_wheel for protobuf: finished with status 'done'
  Stored in directory: /root/.cache/pip/wheels/c9/97/49/1bf6b7b58d0adec650bcb625b6656877437d1f7d18c32e88ee
  Running setup.py bdist_wheel for shapely: started
  Running setup.py bdist_wheel for shapely: finished with status 'done'
  Stored in directory: /root/.cache/pip/wheels/c8/d4/e8/59d227c699be1c99199bff376d98b363c0099cd43697b0d644
  Running setup.py bdist_wheel for future: started
  Running setup.py bdist_wheel for future: finished with status 'done'
  Stored in directory: /root/.cache/pip/wheels/11/c5/d2/ad287de27d0f0d646f119dcffb921f4e63df128f28ab0a1bda
Successfully built mapbox-vector-tile protobuf shapely future
Installing collected packages: protobuf, shapely, future, mapbox-vector-tile
  Found existing installation: protobuf 2.6.0
    Uninstalling protobuf-2.6.0:
      Successfully uninstalled protobuf-2.6.0
  Found existing installation: Shapely 1.4.3
    Uninstalling Shapely-1.4.3:
      Successfully uninstalled Shapely-1.4.3
  Found existing installation: mapbox-vector-tile 0.0.11
    Uninstalling mapbox-vector-tile-0.0.11:
      Successfully uninstalled mapbox-vector-tile-0.0.11
Successfully installed future-0.15.2 mapbox-vector-tile-0.3.0 protobuf-2.6.1 shapely-1.5.16