Board Thread:Support Requests - Getting Technical/@comment-11371204-20130629013522/@comment-4674838-20130629050402

@Princess Platinum: Are you by chance using the Internet Explorer web browser? I believe Internet Explorer does have a automatic popup option for allowing the webpage to access the clipboard.

I'm fairly certain other browsers like Firefox and Chrome don't have this option (at least, not in such a user-friendly fashion, it would require jumping through loopholes like the one Bobogoobo posted) – again, for good security reasons.