I do not fully understand what you do, but I will try to explain Jitsi and hopefully you can figure out what goes wrong.
Jitsi Meet is a system with a central server. You can connect to it and use it with your own browser (chrome, firefox) to have a conference with other people (2-70 people). It is very unlikely you want to have your own server. You can use https://meet.jit.si or one of the many other open servers.
If you want to use Jitsi on your phone or tablet you need an app from Google Play. If you want to have an app on a PC (instead of your browser), you can install jitsi-meet-electron.
To complicate things, a few years ago the same group of developers made Jitsi Desktop. Since Jitsi Meet became mature few people use it. You probably do not want to use this.