Unreal Engine 4 Crash: Animation Problem

I have recently started learning to use Unreal Engine 4, especially after learning that I need to create a playable demo to apply for a job at a game development company in Japan. I have been following a tutorial on how to make an action RPG scene (https://gamedevacademy.org/action-rpg-unreal-engine-tutorial/) and have created the animation behaviors and logic for the player character. Every time I try to access the animation blueprint called PlayerAnimation, however, the program crashes. What can I do to remedy this problem? Your help is greatly appreciated.

Below is a copy of the log info relating to the crash.

LoginId:166646804628944eb91ca6bdfe5009c3
EpicAccountId:7b26f18a0e4142498ba908e4a95c2f59

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000030

UE4Editor_UnrealEd
UE4Editor_Engine
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_ClassViewer
UE4Editor_ClassViewer
UE4Editor_ClassViewer
UE4Editor_ClassViewer
UE4Editor_ClassViewer
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
user32
user32
UE4Editor_ApplicationCore
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll