If you use Wayland windows manager try X.org, just at log in screen choose it at the right bottom corner. Wayland at this moment does not support screen capturing.
Posts made by mat90x
RE: Opera does not allow screen sharing in streamsOpera for Linux
Speed dial miniatures occasionally got wiped while using other deviceOpera for Linux
I use Opera for Linux most of the time and always use speed dial miniatures for easy navigation.
Every time I start to use other Opera for Windows on other device, random number speed dial miniatures in random order got wiped out and become transparent, though they stay fully functional.
Both operas are synced via the same account.
I use Ubuntu 18.04.5 LTS and Windows 10 with latest updates.
I use Opera for Linux 74.0.3911.107 and latest Opera for Windows.