I have created a clean install of Ubuntu and Jitsi using the new video guide. It works fine. I have installed the Letsencrypt (certbot) certificate and this is showing as a valid certificate in a web browser.
When I try to connect the Android app (on Samsung Note 9 with the Android Pie update) I get a red screen saying ‘Unfortunately, something went wrong’ …
Connections using web browsers work fine (except when using a web browser on an adroid device).
Here it suggests a missing valid TLS certificate - but I have the certbot certificate and that works fine on the web pages
This 7 day old thread (as @2019-02-14) which has had no reply yet appears to be the same issue.
I have opened ports as instructed, tcp 443 and 80, upd 10000:20000. It doesn’t matter if I try it using an internal connection bypassing the network-edge firewall or try using an external inbound connection, the result is the same. I am using a FQDN (with a split DNS, so the internal connection should work). I can connect to the Jitsi test site fine using the app, but not my own server. I have also checked that the ufw firewall has those ports open (again) and the ports list is taken from that status report - so the issue is NOT the edge firewall.
Be grateful for your help.