Jitsi-Meet apps is black screen on Android phone

Hi! We have installed a new jitsi-meet server for our conference. Everything’s working using desktop and laptop. When we tried to use an app from android phone and enter the conference room, the screen of the phone is just black. What could be the reason why it’s not working? and if there’s a link for troubleshooting, kindly send it to me. I’m currently looking at google, as well. TIA!

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Did you install valid certificate or at least let’s encrypt certificate?
Mobile will not work without a valid certificate.
Also have you tested desktop/laptop from Internet, not from the local network where jitsi-meet (videobridge) is running, is it working? Often people do not check the advance settings, when running jvb behind NAT.

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We have valid cert from our jitsi server. Also we test our local jitsi using desktop/laptop (good camera and microphone) and it worked. However when we try our local server using android phone, the phone screen or conference was black. Thanks.

Does joining a meeting in meet.jit.si work correctly?

Yes, when we tried joining a meeting at meet.jit.si using our android phones, it works correctly.

Can you show us the output of adb logcat when you join a call on your server and see this failure?

Also, what kind of cert do you have? Are you including the full chain?

Custom server installed with self-signed certificate works well, but joining on the conference using mobile app give us black screen. If we will install a third party CA will it work for mobile? Will it cause conflict too?
Our certificate provider told us they supports linux machines, but we are not sure if it will work.

I was having the same issue, and found that I needed to go into the setup screen of the app, and put in my server URL. YMMV…

Sorry , but i understand you. I have the same issue. I have a public certificate, that it is working with problems. The url is: https://conferencia.grupoelastorsa.com. In apple, laptop, computer work perfectly, but in Android not. Can you help me?

Hi @Javier_Valero looks like your server is misconfigured, as the full cert chain is missing. You can check it yourself here, and see the steps to fix it: https://whatsmychaincert.com/?conferencia.grupoelastorsa.com

Missing chain certs is usually the problem. Alas, it’s not easy for us to detect this problem and alert the user.

Ok,you were right. I have changed my apache2.conf, line cert chain and it works.

@Javier_Valero how you fix the error please ?

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I am using 3.8.0 sdk. the sdk is integrated with an app. not all times but sometimes while I am running the release build of the app. the black screen appears and LogCat shows undefined evaluating A.id and some times undefined evaluating l.id. But when debugging it separately the error not occurs. Do any one have any solution for this issue?
Thanks in advance

We are on SDK 5, you SDK is severely out of date, please update.

If I update, I have to change the target sdk version . then I can’t install it on android 9 and 10
above SDK v4 targets API 28 and above

That’s not true. The target SDK is irrelevant, we set the minimum SDK to 23, so it’s still possible to use on Android 6.0 devices.