There are a lot of issues on Opera they need to address. After every update there is a problem. Mine is always saying no internet connection when I have one and it won't stop opening with spotify no matter how I change the settings and it is really hard to get any help that works. But it is better than Mozilla/firefox or Edge, Everytime I reinstall opera the same thing is still there, I would be furious if I had to install windows 10 again,. Good luck.

@opa57 I play at Lichess and I have never noticed a chat window. I have used other browsers too.

@sgunhouse Thank you so much, I don't usually use the side bar because Windows 10 which I just got has to much popping out all the time as it is.
I would have never found it. Thank you again.

I have the same problem, and I need to get to the same button. No one has helped yet I take it?