Building my game gives issues

So I have a game with lots of scripts in it (nothing special I guess), but when I build the game some of the things don’t function like enemy momevent and attack or stuff works differenly like spells don’t aim correctly and mana charges slower. How do I figure out what my mistake is (I can’t find any output_log.txt file like many posts suggest)?

Alright figured the issue out, so I had two objects with the tag “Player” so 2 transforms that enemies tried to find which resulted in an error. But for some reason this error doesn’t get created in the editor.