Randomly crashes in compiled project

Two weeks ago we switched from version 4.15 to 4.18. Having corrected the new errors, and making sure the game was working through Standalone Game, we were able to compile the project without errors. However, the game itself was not stable - during the walktrough of the level the game crashes out in certain areas / after some progress in the walktrough. Crashes occur randomly (When entering the menu, when walking on an empty section of the map or in process of dialog with blueprint characters), which makes it extremely difficult to find the problem.
Tryind to understand what’s wrong, we found this line in
Despite the fact that our project is not mobile. Reinstalling the engine, recompiling C ++ code did not help us too.
Perhaps the error really is in weapons. But the weapon in the project was completely correct, and its parent class was recreated, but this not change anything.
Below, I attached the logs of the game. Tell me, what could be the problem?

Log 1,
Log 2,
Log 3,
Log 4.