UE4 4.20 to 4.21 Assertion failed (Index >= 0) & (Index < ArrayNum)

I was using unreal engine 4.20 to make a videogame, but when i tried to package i had an error that i solucionate migrating the proyect to 4.21. But there is a new problem:

I package my game in ue 4.21, all works fine in the main menu, but when i want to play (loading a scene) It crash with the message Assertion failed (Index >= 0) & (Index < ArrayNum). Searching in the foro i find some possible situations, corrupted files or there is a problem with an array of a blueprin; i has a lot of blueprints with a lot of arrays, i check some of them but there isnt a problem.
Any suggestion or possible solution?