A TimThumb error has occured

The following error(s) occured:

You may not fetch images from that site. To enable this site in timthumb, you can either add it to $ALLOWED_SITES and set ALLOW_EXTERNAL=true. Or you can set ALLOW_ALL_EXTERNAL_SITES=true, depending on your security needs.

Query String : src=https://www.irtvs24.com/wp-content/uploads/2023/02/33dow-1.jpg&h=50&w=50&zc=0%3E
TimThumb version : 2.8.13