Talk:FGO 2016 Summer Event Re-Run/@comment-32563508-20170713100128/@comment-4802891-20170713101038

It's a message to say the game isn't running normally and is asking you if you want to clear out cached data. You can press whatever, it won't affect your game too much. If you say yes, you might get some lag on Servant profile the first time you go there (which is what I got) but overall, it won't affect anything.