Push Message Container is blank and has broken icon

Hi,

The area in the bell popup with the class .pnfpb-push-msg-container has no text (just a bunch of light grey lines) and has a broken image. I have an icon uploaded that will show in the top subscribe popup and I can’t seem to find where there is a specific place to edit text for this field. I don’t see where I can customize text specifically for this field. Can you give me guidance on this?

Thanks