Dispatcher does not start

I'm trying to follow the directions for running the "hello world" example, but I don't believe my Dispatcher service is starting.

```
(.zoc_test) [10:16]me@machine:zocalo-test[1004]$ pip list
Package Version Location
--------------- ------- ------------------------------------
docopt 0.6.2
graypy 2.1.0
nested-lookup 0.2.21
pip 20.1.1
setuptools 47.3.1
six 1.15.0
stomp.py 6.0.0
wheel 0.34.2
workflows 2.0
zocalo 0.6.3 /home/me/python-zocalo
zocalo-examples 0.0 /home/me/python-zocalo-examples
(.zoc_test) [10:16]me@machine:zocalo-test[1005]$ zocalo.service --test -s Dispatcher -v
```
Any advice on what needs to be done in order to get this going would be greatly appreciated.