Fix invisible loading images

Hi Github users,
I’m currently dealing with this annoying loading of images on my website and just displaying a small icon. I need help on this minor issue and I’ve tried lots of ways to solve it but end up with nothing still, the same small icon still appears. This is the link to the website:

An assignment to be submitted before due and quite urgent.
Thanks very much, Appreciated!!!

What image are we talking about here? Images on the site look fine from my side.

Never mind I’ve fixed it already, that has happened previously on my side.