When i try to go on an old world i made (when you could only have a certain amount of space ) the green bars fully load but the world doesn't and it does that with new worlds on the classic world so i can't go on the old worlds that i have.

it's really quite annoying because i would like the see the old worlds that i made at most 5-6 years ago in their full glory again.

 

 

And for the Affects versions bit i just put 1.7.1 because i just found this out and i don't know if it has been happening for a long time or not.