ANTM/Assets/WidthCheckerFixer.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class WidthCheckerFixer : MonoBehaviour
{
	public float requredWidth = 100;
	public RectTransform rectTransform;
	private void OnEnable()
	{
		if(rectTransform.GetWidth() <= 0)
		{
			rectTransform.SetWidth(requredWidth);
		}
	}
}