Thanks for the help, but that doesn't really solve my problem.

The url: https://link.opera.com/bookmarks/ doesn't show my bookmarks, it only shows some message I shared earlier.
It's not that I don't know how to download something like that, it's simply not there.

Any idea's?

Nope. It does still say 'Speed Dial'/'Bookmarks'/'Notes' up top, but they all link back to the same page, with this message:

Opera Link is no longer supported!
Opera Link was yesterday's way to sync. Our new, integrated syncing service is baked into the browser you're using. Sign into your Opera account directly in the browser. You'll get the latest Opera account services and can sync your browsing across computers, phones, and tablets.
For more information about syncing, check out our frequently-asked questions.

Anyone else having the same problems? I just want to download my old bookmarks, even as just a plain text file or something.

I may have just not been following release notes carefully, but all my bookmarks are still in Opera Link. I never managed to synch them to the new bookmarks services, and now apparently Link is no longer supported. Are these bookmarks just gone?