Hi, so I had the same exsact problem... i played a bt around in the config and in the settings of operaGX, and i tried something and it's working!
Just go to your: Opera Menu>Update & Recovery> "button" Recover
select to keep data and hystory and recover opreaGX, it will wor 100% at least it does for me!
image_2024-06-18_213532843.png