Can’t share my screen on apps – Microsoft Community.Discord Screen Share Not Working? 6 Ways to Fix
If you keep running the black issue when streaming in fullscreen mode, try switch to Windowed Mode. You may require to add it to your Discord profile. To fix that, you should disable hardware acceleration both in the Discord app and browser or game that you want to share.
Discord cant share application window – discord cant share application window
Delete the Discord cache folder. Turn off the Use our latest technology option.