Screenshare showing black screen for some users

Hello everyone,

This is a strange issue we’re facing. In a conference when the moderator is doing screen share, some people has reported that they could only see a black screen whilst other could see the presentation with no issues. Asking about the browser, they were with Chrome. So I was wondering if there could be anything on their end that needs to change (firewall?) or if there’s a limit in Jitsi on how many people can see a screen share at once.