@volosguard:
(1) Open file rbfeeder.ini to edit
sudo nano /etc/rbfeeder.ini
(2) In above file, scroll down to this line:
#mlat_cmd=/usr/bin/python3.5 /usr/bin/mlat-client
(3) Immediately below above line, copy-paste this line:
mlat_cmd=/usr/bin/python3.7 /usr/bin/mlat-client --results beast,listen,30007
(4) Save file (Ctrl+O) and Close (Ctrl+x)
(5) Restart rbfeeder
sudo systemctl restart rbfeeder