Local network and jitsi meet android


I would like to use jitsi meet android on local network. for example :
But jitsi meet androids disconnects.
If I use a jitsi meet android through Internet, it is okay.
Any idea ?
What is the way in order to investigate ?

Thank you very much

You need to enter the domain you used when deploying and make sure for mobile you have a valid certificate.

The router supplied by my internet provider does not support loopback. So I cannot use my public domain to reach my local jitsi server Any solution ?