index out of range - Error

[brahmastra2016]

./twampy.py controller 18.18.18.1 -d

18/04/20 12:15:49,979 INFO CTRL.RX <>
18/04/20 12:15:49,979 DEBUG CTRL.RX 00000000000000000000000000000001e534284aa1d0de6cf680a8398785a65c224a864ad14fd0292973627eb288684b00000400000000000000 (58 bytes)
18/04/20 12:15:49,979 INFO TWAMP modes supported: 1
18/04/20 12:15:49,980 INFO CTRL.TX <>
18/04/20 12:15:49,980 DEBUG CTRL.TX 0000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
18/04/20 12:15:49,980 INFO CTRL.RX <>
18/04/20 12:15:49,980 DEBUG CTRL.RX 000000000000 (6 bytes)
Traceback (most recent call last):
File "./twampy.py", line 797, in
options.func(options)
File "./twampy.py", line 567, in twamp_controller
client.connectionSetup()
File "./twampy.py", line 482, in connectionSetup
rval = ord(data[15])
IndexError: string index out of range