GR-GSM: Unable to find any supported SDR Device

[Warhammar]

INFO] [UHD] linux; GNU C++ version 11.2.0; Boost_107400; UHD_3.15.0.0-5
[ERROR] avahi_service_browser_new() failed: Bad state
Traceback (most recent call last):
File "/usr/bin/grgsm_livemon", line 385, in
main()
File "/usr/bin/grgsm_livemon", line 361, in main
tb = top_block_cls(args=options.args, collector=options.collector, collectorport=options.collectorport, fc=options.fc, gain=options.gain, osr=options.osr, ppm=options.ppm, samp_rate=options.samp_rate, serverport=options.serverport, shiftoff=options.shiftoff)
File "/usr/bin/grgsm_livemon", line 113, in init
args="numchan=" + str(1) + " " + str(grgsm.device.get_default_args(args))
File "/usr/lib/python3/dist-packages/grgsm/device.py", line 55, in get_default_args
raise RuntimeError("Unable to find any supported SDR devices")
RuntimeError: Unable to find any supported SDR devices

I have Realtek RTL2832U DVR Dongle.
What am i doing wrong_

[PARAMJAI]

After giving a good try I am wondering now if this IMSI Catcher had ever worked for anyone?