Images not publishing on blog post - Customised coding issue?

Hi guys,

I'm having an issue with my blog page. When editing i can upload images but when i save it and view the blog post in the published mode the images dssappear! I messaged Square Spcae for help and they said this:
It seems that some of the custom code you’ve added to your site's Design > Custom CSS panel is causing the image issue you reported. Troubleshooting code falls outside our scope of support, so we can’t pinpoint the exact issue with the code. However, when I copy and pasted the code onto a test site, I was able to replicate the same issue there. This indicates that the code is causing or contributing to the issue on your site.

I have never attempted any coding as am not experienced in that field. I dont know how this has happened or how to fix it!

Any help is super appreciated, thank you in advance :)
 

Please post the URL for a page on your site where we can see your issue.

A link to the backend of the your site won’t work for us, i.e. a url that contains /config/.

Please set up a site-wide password, if your site is not public and you've not already done so.

Post the password here.

Adding a site-wide password does not allow anyone to alter your site. It only allows those with the password to see your site.

Please read the site-wide password and how to share a link documentation to understand how they work.

We can then take a look at your issue.

You may find How to post a forum question post useful.