@leocg
My apologies for not including.
Opera One(version: 112.0.5197.39).
Also the laptop is a rather old Dell Inspriron 1501.
Opera its self seems to be working OK, as is watsapp.

Thanks
Malcolm

I've just started using Linux Mint and have installed Opera Browser. When I tried the Aria AI, its window starts being perfectly readable, then becomes a mass of colored rectangles jumping around its window. Being an absolute newbie to Linux I've no idea where to start looking to solve the problem.
No extensions are installed, and the ad blocker is OFF. My version of linux is
NAME="Linux Mint"
VERSION="21.1 (Vera)"
ID=linuxmint
ID_LIKE="ubuntu debian"
PRETTY_NAME="Linux Mint 21.1"
ID="21.1"
The instalation level is MATE

I appologise for the lack of detail, as I've only got a couple of hours of linux under my belt.

Thanks in advance
Malcolm