Get a better browser.
It’s MalwareBytes finding a problem with the website, not the Opera V95 Browser. And I trust MalwareBytes over anything else’s findings. Check your own browser Settings, for Tracker Cookies; you’ll likely have some, or worse, from that site. But I do always enjoy your posts.
MalwareBytes defines “compromised” as:
“Compromised sites (or servers) are otherwise legitimate sites that are being used by hackers without the owner’s knowledge. Compromised sites are often used to house and spread malware.”
FYI.