The world doesnt load

Good morning.
I have the problem: I have built my city from the version 0.14.0 till version 1.1.2 for almost 2 years. Two weeks ago some mistake happened, I was got out of the city and can not load it any longer. When I try to launch it it stops in the middle and nothing happens.
Could you help to solve this issue please?
Thank you in advance
Elina.