Dynamic image not displaying with src

Hello

I have been trying to display the dynamic image like it showed the documentation but it is not working for some reason. I tried the url from the database and the manually enter the name the path. It is not showing anything.
I checked the database the file has been uploaded - and the path too. I checked the server folder the image are in the exact folder I sent them.
However, It is not showing up.
SOS please.