Link to my arena not working for friends.

Since I don't have much time, I'll go straight to the point. I still have problems with my arena. The creation process is smooth, and I got the link via both pop-up and the "share" icon. However when I try to share the link with my friends nearly every one of them reports a problem. They say the link isn't working. I simply used the "link" button, entered the url, and send it. The links all work for me, i.e. when I click them myself they all redirect me to the page. However it ain't working for my friends. Any ideas? I'll appreciate any help. Thanks. (PS: the arena starts (or will be cancelled, for that matter) in 20 minutes, so I'll greatly appreciate a quick answer that provides a speedy fix for the issue.)

Fr

For real what? What's so astonishing?

Are they using the app or website?