@fonm That probably would solve the dependency problem. But I went through the pain and suffering of the long overdue rebuilding of my workstation to upgrade both the hardware and to install Mint 20. The dependency problem didn't occur anymore.
However, even now, Opera will still not work with things like Twitch and a few other stream content formats. I still get : This video is either unavailable or not supported in this browser. (Error #4000)
I tried adding all kinds of codecs to try to solve the problem, but get the usual error code. I tried to remove ad and tracking blockers to see if that would help. Nope.
Is it too hard for the Opera" developers to test their browser against popular websites, and fix problems which I find are reported extensively for Linux installations?
I'm an end-user, not a browser developer. I've wasted way too much time on this and other issues with Opera. Except for the very good text-flow function on Android apps which works great on my tablet, Opera has no compelling reason to be used over browsers such as Firefox.
Sorry for the rant, but I've had it with Opera.
Thank you for your suggestion. --Fred