Trouble with fonts.

Here's the problem. The answer's fields are filled with squares.! Alt text

Here is the code.

public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {

     GUI.Box(position, GUIContent.none);

     SerializedProperty isCorrectProp = property.FindPropertyRelative("_isCorrect");
     Rect isCorrectRect = new Rect(position.x + 5, (position.y + position.height / 1.5f) - 7.5f, 15, 25);
     isCorrectProp.boolValue = EditorGUI.Toggle(isCorrectRect, isCorrectProp.boolValue, EditorStyles.radioButton);

     Rect labelRect = new Rect(position.x + isCorrectRect.width + 10, position.y, 85, 85);
     GUIStyle labelStyle = new GUIStyle(EditorStyles.miniLabel)
     {
         alignment = TextAnchor.MiddleLeft
     };
     GUI.Label(labelRect, new GUIContent("Answer:", "Define an Answer."), labelStyle);

     SerializedProperty infoProp = property.FindPropertyRelative("_info");
     Rect infoRect = new Rect(labelRect.x + labelRect.width, (position.y + position.height / 2) - 10, position.width - 75, 70);
     GUIStyle textAreaStyle = new GUIStyle(EditorStyles.textArea)
     {
         fontSize = 10,
         fixedHeight = 15
     };
     textAreaStyle.font = Resources.Load<Font>("Fonts/Arial");

     infoProp.stringValue = EditorGUI.TextArea(infoRect, infoProp.stringValue, textAreaStyle);
 }

I've seen this solution before, but it doesn't work. https://answers.unity.com/questions/684199/how-do-i-change-my-font-in-code.html

Please give a recommendation to solve this problem. Thank you.