Hello,
I would be happy to help. 
It is normal for the FirstAid images to not show, as being proprietary media AnkiHub is not able to provide anything in that field. The field is there for your personal use
You can remove the broken image icons by returning the field to its default protected state, and you can find a bit more info here: AnKing Step Deck Wiki
Please let me know if that answers your question, and if there’s anything else I can help with.