I saw a post from October, which hasn’t been resolved: (can’t link it apparently)
But this has been happening to me since a few weeks too, I thought it was my internet connection, but it works on Chrome. So I figured its an OperaGX problem.
When i go to the website, even though i was logged in before, nothing is clickable. I can type in the box, but can’t hit enter. When i click the menu bar at the top, it says “unable to load history”. When i click the “new chat” button, nothing happens.