Jitsi Meet 3rd party UBUNTU install unable to invite audio participant

On Jitsi Meeting click on “+” invite, enter valid phone number and click on Invite and pop-up window appears stating, Failed to add participants - running on UBUNTU server

Inviting by phone needs this installed and configured: https://github.com/jitsi/jigasi
In fact it’s for SIP, and for phone PSTN calls you need to have a phone number and the appropriate configuration at you SIP server.

Issue is after following steps for jigasi github.com
dev15@dev15-box:~/jitsi/jigasi/target/jigasi-linux-x64-1.1-SNAPSHOT$ ./jigasi.sh --domain=dev15-box.dev.coredial.com --subdomain=callcontrol --secret=topsecret
Error: Could not find or load main class org.jitsi.jigasi.Main
Caused by: java.lang.ClassNotFoundException: org.jitsi.jigasi.Main

ClassPath (cp) defined in sh script file, but still get error above?