Is it only happening to me or is it a fandomwide problem? And I have been having this problem for a few days now.
It's probably not a FANDOM problem at all. Worked fine for me on Firefox: https://battlefordreamisland.fandom.com/wiki/List_of_Battle_for_Dream_Island_characters?veaction=edit
What browser are you using and are you on a school network?
Happens to me a lot. Just click ok and it should work
What do you think?