don´t run ais-simulator.py

[Iriss2002]

Sorry for my English, well the thing is, I followed all the steps to install ais-simulator, and when I run it I get this error.
I thought it was libsub, and I reinstalled everything, then I thought it was the fault of pulseradio, I even installed alsa in case that was the problem.
This is all for testing the aiscot plugin on FreeTakServer.
The truth is that I can't find any information about it anywhere.
I would appreciate some help or some place to look for the solution.

Best regards.

:/usr/src/ais-simulator# python3 -u ais-simulator.py
gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.10.1.1
built-in sink types: uhd hackrf bladerf soapy redpitaya freesrp file
[INFO] [UHD] linux; GNU C++ version 11.2.0; Boost_107400; UHD_4.1.0.5-3

RtApiPulse::DeviceInfo pa_context_connect() failed: Connection refused

libusb: warning [libusb_exit] device 2.1 still referenced
libusb: warning [libusb_exit] device 1.4 still referenced
libusb: warning [libusb_exit] device 1.2 still referenced
libusb: warning [libusb_exit] device 1.1 still referenced

RtApiPulse::DeviceInfo pa_context_connect() failed: Connection refused

RtApiPulse::DeviceInfo pa_context_connect() failed: Connection refused

RtApiPulse::DeviceInfo pa_context_connect() failed: Connection refused

[INFO] Using format CF32.
Segmentation fault (core dumped)