One of ways didn't available after done map.

I finished the map (green on pic). After that three out of four available ways were unlocked (blue on pic), but one is blocked (red).
It s common map, have straight way and I don't understand why it is blocked. (try to reload game and click, but didnt help)
Img on G-disk: https://drive.google.com/file/d/1NbS4G9uolcZi6lyAqAG_Jswn6pawJfHq/view?usp=sharing