The problem with the map [1.15.2] (Minecraft)

Good time of day. Built the map, built and built. Now the map does not start, logs can not trace and to find out the cause too. The map is not even in the boot state, just appear the screen of blocks of the earth and all. All other worlds load fine.
Here is a link to the map : https://yadi.sk/d/JH6JVGZQTnbXsA