Terminal config using .sip isn't working

I’m trying to tweak jitsi but can’t fine tune from the terminal. I’m writing from the command prompt: “sudo vi ~/.sip-communicator.properties” and it took me to a blank terminal page
with the cursor doing nothing. I’m in vm terminal on Debian. That login is exactly what is written on this site’s login “help” page.
It says…“or sudo vi ~/.jitsi”. But both look wrong. Help?