I’m having the same problem. And I’m in the US. This is new, as I use Pixabay quite a bit.
Though I’m getting a 530 error in the browser, then a 1016 if I try it myself. And this is where it gets interesting. They’re pulling that file from an S3 bucket.
I expect they’ll figure it out soon enough, but there’s nothing Cloudflare can do about it. Pixabay has to fix this.