Only one usage of each socket address (protocol/network address/port) is normally permitted

[TazDevl74]

C:\Temp\Timeroast\timeroast>timeroast.py
Traceback (most recent call last):
File "C:\Temp\Timeroast\timeroast\timeroast.py", line 145, in
main()
File "C:\Temp\Timeroast\timeroast\timeroast.py", line 140, in main
for rid, hashval, salt in ntp_roast(args.dc, args.rids, args.rate, args.timeout):
File "C:\Temp\Timeroast\timeroast\timeroast.py", line 32, in ntp_roast
sock.bind(('0.0.0.0', 123))
OSError: [WinError 10048] Only one usage of each socket address (protocol/network address/port) is normally permitted

I'm getting this error in my testlab and in a production env.