Broken images on Github pages.

Hi - this is my first project posted on Github and any help would be really appreciated. I have seen that an issue was resolved under broken images but the code is no longer there. 

Below, the first two images are of the site I have built on my computer. The following two are on Githib pages. 

When I click some of the links in the “Products and services section” some images load. I am very confused.

Really keen to share with the person I have built for. Any ideas?

Thanks for any help :slight_smile:

Link to code is here -