Well, for some requirements we had to install the Jitsi custom frontend to make modifications in messages, UI and other things. But since we made these modifications, actions such as screen sharing were disabled. I have been looking for guides or default configurations to try to reconfigure and do it correctly. On the other hand, I have read that this function had been disabled by bugs. I would appreciate your help and if you need the configuration files, I will share them as soon as possible.