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=http://www.zj-bd.com/upload/2021/04/%E6%9C%AA%E6%A8%99(bi%C4%81o
TimThumb version : 2.8.14