The problem of the character standing on the ground

To fix the issue, please do the fallowing:
-Drag your character prefab into the scene.
-Unpack your character prefab.
-Create an empty object, and set the position to 0, 0, 0
-Copy your "Hitbox script" component, and paste it onto your empty object.
-Remove your "Htibox script" from your character.
-Parent your character to your empty object.
-Offset the character's transform (NOT THE EMPTY) to align with the floor.
-Save the empty as a prefab.
-In your character file, set the character prefab as your newly created prefab.
And you are done!