Errors when lunching Gnuradio-Companion

Hi folks,
I am new user and trying to run gnuradio under Ubuntu.
I am not an Ubuntu and gnuradio user but I am trying to
Run a program that uses gnuradio.
When I run gnuradio-companion, I get the following errors
Either in gnuradio and in the Ubuntu terminal:

Preferences file: /home/vincenzo/.gnuradio/grc.conf
Block paths:
/home/vincenzo/.grc_gnuradio
/usr/local/share/gnuradio/grc/blocks
/usr/share/gnuradio/grc/blocks

Loading:
“/home/vincenzo/HAM/gr-ax100-master/examples/ax100_rx_fm_demod.grc”

Error: Block key “ax100_adsb_kml” not found
Error: Block key “ax100_beacon_parser” not found
Error: Block key “ax100_gomx3_rs_decode” not found
Error: Block key “csp_check_crc” not found
Error: Block key “csp_print_header” not found
Error: Block key “synctags_fixedlen_tagger” not found
Done

Showing:
"/home/vincenzo/HAM/gr-ax100-master/examples/ax100_rx_fm_demod.grc

I have also tried to reinstall it but get the same problem.
Any help?
Enzo