Got it.
Not really sure how, but I think the conversational repo in the original post was pointing to the older python2 version. Once I cloned the python3 branch directly from the github page and re-ran the python3 pip install everything cleared right up.
-R
EDIT - I knew this was too easy. Now I'm getting an unexpected realtime delay error 5 seconds after probe basic starts up.
I hate clogging up an installation guide thread, but here's the terminal output:
Unexpected realtime delay on task 0 with period 100000
This Message will only display once per session.
Run the Latency Test and resolve before continuing.
[qtpyvcp.plugins.notifications][ERROR] Unexpected realtime delay on task
0 with period 100000
This Message
will only display once per
session.
Run the Latency Test and
resolve before continuing. (notifications.py:139)