This started a few weeks back and I've been unable to find the exact same issue mentioned anywhere. Really close to ditching Opera and it's a major nuisance.

Whether from email, Facebook, Twitter, a website, or anywhere else, when I try to do a download I get no error message. It just doesn't work.

In View -> Download History, every attempt ends up looking like the two that show up in the attached screenshot.

I have exceptions built into my ad blocker (not that these are ads). Unfortunately, not explanation is given. There's nothing to point to why downloads are canceled or by what.

But this is 100% of attempted downloads. 100%!!