未能找到带有hash string 'android-25'的目标

I have Android Studio 2.2. I am trying to open a project, but I get the error "Failed to find target with hash string 'android-25'". Below the error message I see a link "Install missing platform(s) and synch project". If I click this link, I get another error, which says I have Android Studio 2.2. I am trying to open