This is not the full end like the second advent and after the 1000 years. So when was this judgment? We have not seen it since the creation of mankind and mankind will ALWAYS inhabit the earth. So, since the time mankind had been created to the full end there will never be "No man". So This Judgement has to be BEFORE man was created. It is the fall of Satan.
What do you do with verse 26, who built the cities if there was no man?
The Angels.