/usr/bin/cerbot no such file or directory line 81 error

Hello,

im using ubuntu server 16.04
i just install jitsi on my new vps.
and i stuck when run
sudo /usr/share/jitsi-meet/scripts/install-letsencrypt-cert.sh
the errors says " usr/share/jitsi-meet/scripts/install-letsencrypt-cert.sh: line 81: /usr/bin/certbot: No such file or directory "

help me please im stuck. thank u very much