Camera going weird ?

I am following these tutorials : https://www.youtube.com/playlist?list=PLL0cLF8gjBprG6487lxqSq-aEo6ZXLDLg

There is always a weapon showing in along with the character. Why am I getting it like this ?

Secondly, after creating the minimap with camera, and then after simply adjusting my rifle, the default camera goes to the minimap camera, and even the aimDownSight is also not working :

and I keep getting this error :
Blueprint Runtime Error: “Accessed None trying to read property CallFunc_DeactivateADS_CharacterMovement”. Blueprint: ThirdPersonCharacter Function: Execute Ubergraph Third Person Character Graph: EventGraph Node: Set MaxWalkSpeed

  1. Blueprint Runtime Error: “Accessed None trying to read property CallFunc_DeactivateADS_CharacterMovement”. Blueprint: ThirdPersonCharacter Function: Execute Ubergraph Third Person Character Graph: EventGraph Node: Set MaxWalkSpeed

  1. These are the errors :