I wrote a document in my space, then tried to move it over to my team's space, but I wasn't allowed to.

I have all of the needed permissions for the destination space (view and create items), and of course the source page is my own page, so I should be the "admin" of that, right?
https://support.atlassian.com/confluence-cloud/docs/move-copy-and-hide-pages/
I ended up copying and pasting the contents into a new page, which worked fine, but I don't understand why the "move" didn't work.