User blog comment:Dragonjet/KanColle Command Center/@comment-7168448-20150215064604/@comment-1820055-20150215071133

its recommended to join the lottery via DMM website itself. KC3 extracts your API link automatically which probably gives you an error cat.

Even if you were able to win the lottery, the first time you enter, you will be asked to input your Admiral name, which does not work on Command Center.

There's no need to uninstall KC3 though, just disable game redirect from the menu, and continue on with the lottery, and name input directly on DMM.