Hmmm I'd like to fix this if I can, would you be able to load the above code in, click a tab, then open the console (Ctrl + Shift +J) and send a screencap or copy/paste what's in there?
I hope this is what you need! It looks like its the same before and after clicking tabs too?
Edit: even without code in it boots up with that too, if that helps at all
Yep, that's the one. Interesting, the SyntaxError messages don't show up elsewhere - the errors are making it seem like the browser isn't loading the files fully. There's more I could investigate but it might be a good idea for me to install Opera GX and check it myself - I've had a few people mention issues that only happen on Opera GX. Is it possible it has some sort of adblocker or VPN installed?