I found a photo from the workshop showing that the ace compat has expired.
https://steamcommunity.com/sharedfiles/filedetails/?id=1638662472
At the same time, I found four @ace_compat folders under the ace folder.(Arma 3\!Workshop\@ace\optionals)
So now the ace already contains ace_compat? We don't need to load ace_compat extra?