Map check finds some kind of error with light (

(if anything, I’m with google translator)
I decided to build the lighting
I waited for 5 hours and was 1 percent all the time. At the sixth hour, UE4 crashed (1 and 2)
I have cut the unbuild in half, but the same result
Then I reduced it to 872 (removed ALL lighting), but still UE4 crashed
(this was version 4.25)
Then I downloaded version 4.26 and tried to build there
And showed it to me (3)
Please help, I will be very grateful