[Errno 10061] No connection could be made because the target machine actively re
fused it
Your cgminer is not listening on localhost on the port 4028. The monitor can't connect to it.
You can either launch cgminer with default API settings (listening interface/port), or you can edit these 2 lines at the top of cgminer-monitor.py.
cgminer_host = 'localhost'
cgminer_port = 4028