After starting screen sharing, only the black screen is visible.
This problem may be caused by the window manager malfunction on Linux.
Login the system with Xorg session, not with the standard one.
Do this by ending the current session in your Operating System. Before re-sign in back, click the gear icon on the login screen. Choose the Xorg option.
Change your browser configuration by opening an appropriate page in your browser:
Google Chrome: chrome://flags/#enable-webrtc-pipewire-capturer
Yandex.Browser: browser://flags/#enable-webrtc-pipewire-capturer
Select "Enabled" for the WebRTC PipeWire support flag.страницы:
Select the Entire screen during the system check.
Select the Entire Screen tab and click on the desktop thumbnail there. Clik "Share".
On repeated window appearance, click "Let access".