Social link block error

Hi everyone :),

I wonder if you can help me with an issue regarding the social link block, the symbols used in each social button seem to disappear when the site is saved, however they are visible in the editor. (See screenshots below). I have contacted support and they told me that this is due to code injection in the site. However, we require this code in order to display our cookie banner and so on. 

Does anyone know how to resolve this error?

If support said the issue was the code injection, I suspect we'd have to see that to have a shot at answering.