Screen sharing with integrated BBB not possible

[kdre]

Description:

If you start a BBB Chat inside Rocket.Chat and try to share the screen the following error message appears: "ERROR: Permission to access screen wasn't granted."

Steps to reproduce:

1. Click on BBB Video Call
2. Enter the chat room
3. Click the screensharing button

Expected behavior:

Screen should be shared.

Actual behavior:

ERROR: Permission to access screen wasn't granted.

Server Setup Information:

• Version of Rocket.Chat Server: 3.1.1
• Operating System: Debian Jessie
• NodeJS Version: v12.16.1
• MongoDB Version: 4.0.17

Client Setup Information

• Desktop App or Browser Version: Firefox
• Operating System: Manjaro Linux

Additional context

I found a reported issue that is similar to what I experienced: bigbluebutton/bigbluebutton#8846

After digging around a little, I found the following in the file "app/videobridge/client/views/bbbLiveView.html":

<iframe allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true" allow="geolocation; microphone; camera" src="{{source}}" width="380" height="400" frameborder="0"></iframe>

It looks like ' allow="display-capture" ' should be added to the iframe tag to solve this issue.

[bbrauns]

already merged #17290

[einhirn]

Similar to #16993

[gabriellsh]

already merged #17290

Please try updating your server, should be fixed. If it persists, please comment here.